Email header example. For example, the …
View an Email Header on Gmail.
Email header example txt This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. Add blog Surreal mixes up its email headers by choosing different shades from its brand colors. It's a common misunderstanding because users rarely see an email We would like to show you a description here but the site won’t allow us. First, let’s see how to create and send a simple text message (both the text content and the addresses may contain unicode characters): I'm currently using the following code to download a message, add a custom header to it and then add that message back into the mail folder: using (ImapClient imap = new ImapClient()) { imap. An email banner is also the perfect space to market your brand. package com. Usually, it is a fragment of the very first sentence of a With Canva, you can create an attractive and effective email header in minutes. Explore its benefits and how to set it up in this blog post. For example: Take this email header design example created by graphic design school Shillington. It could be anything from a missing space after Subject: to a case-sensitivity issue. Source: Really Good Emails. Business templates. SMPT Basic Structure Sample Email Header and Fields of Interest Below are the email headers for one of the Malspam campaigns found to distribute JAFF ransomware. Crafting a good email header involves several key components The opening paragraph should immediately convey the email’s intent. This allows, for example, emails signed by sub. Here are descriptions of some of the email header fields: For example, it’s always a good idea to remind free signups that they might want to pay to subscribe. Email headers help to authenticate, track, and avoid spam emails. 4. You can use it to send an important message, present or announce a piece of If you want to include non-ASCII characters in your email headers, say in the Subject or To fields, you should use the Header class and assign the field in the Message object to an instance of Header instead of using a string for the header value. I am writing to [brief purpose of the email]. This email header from Canva is great because it’s concise, creative, and conveys urgency Related Post: 10 Tips That Will Make An Email Stand Out. Here are a few examples of how to use the email package to read, write, and send simple email messages, as well as more complex MIME messages. Paste the email source code and locate the sender's IP, its location, latitudes, and longitudes for free. You’ll So, for example, if you’re sending emails from alexthecoolguy@bestcompanyever. Email headers provide a powerful toolkit for troubleshooting deliverability, avoiding phishing, and fine-tuning engagement. This is a simple email header from a clothing store. Customize and Download this "Birthday Email Header". This will display email header parameters in a new window. This tool will highlight the Basically email clients ignore any META tags with Content type in them (at least as of 2013-10-17). Clone Phishing. Then with the text still highlighted, hold down the Ctrl and C keys to Example: An email from your “bank” asking you to log in to your account via a provided link, which then leads you to a fake banking site that looks identical to the real one. For a resignation, clearly state this at the beginning. An email full with headers where only the last line is not an header but the body. 9. "Birthday Email Header" is in editable, printable format. 0 This What Is A Good Header For An Email? The header of an email is the first element your recipient sees, and first impressions are crucial in email marketing. This section documents the particular header_factory implemented by the email package for handling RFC 5322 compliant email messages, which not only provides Email header example Raw. Example APEX_MAIL API Call For example, if you add a BCC header, your email library may take the header content and create additional RCPT TO commands. All you need to do is pick out an email header template from our selection of customizable designs and then edit it as you see fit. The CTA button has two actionable options - "Sign up There's a good analysis of how exactly this non-standard "Thread-Index" header appears to be used, in this post and links therefrom, including this pdf (a paper presented at the CEAS 2006 conference) and this follow-up, which includes a comment on the issue from the evolution source code (which seems to reflect substantial reverse-engineering of this In relaxed mode, the domain found in the DKIM signature can be a subdomain of the domain found in the “From” header of the email. The case is the following: E-mails are send with the default email address: Creating an email header. The Reply-To: email header is a header just like Subject:, From: or Cc:. de" This was also correctly delivered to the STRATO mail The email headers should be standard. No, that’s not a typo. For example, a one-time confirmation email may not necessitate an unsubscribe link. There are two Examples of Effective Email Headers for Different Platforms. The problem was every time the mail would be sent the mail headers would appear to contain multiple addresses, but in fact only the first recipient would receive the email. You can find many examples of marketing emails by some of the biggest companies that you could use as inspiration for For more information about parts 2 and 3 and for more email header examples and design ideas, please refer to our “Email header” blog post. It also switches from logo-only headers to headers with photos and some text. com, dept01list. Here is an example of a full email header*: Here is an example of the date format on an email header, Thurs, 05 Jan 2021 17:32:16. Note, privacy is important to us and your data is secure with us, we will not store or forward any information provided; please refer to our privacy policy. Email headers can help you troubleshoot deliverability issues, improve your sending reputation, and avoid spam filters. Learn what an email header is, how to view it on different email providers, and what metadata it contains. header module. test. If your header is eye-catching enough, it can get them interested in finding out what you have to say in your email. Our library of email header templates includes different designs This is where the analysis of email headers comes in. Subject: [Topic] – [Brief Description], e. Each mail server that handles an email message adds a Received: header set to the front of the message; the first set is therefore added by your mail server. abc" to your email address "yourname@desiredname. Some of these are easy to read and interpret, like the sections saying that DKIM and SPF verification passed in the [29] To view the email header, depending on the email client, simply use the "Show Original" (for gmail) or "View message details" (for Microsoft outlooks). September Newsletter Head For business email compromise or reply-to attacks, an attacker will craft a phishing email that attempts to have the victim respond to them. If an attacker is able to add email headers using that specific library, the headers will be converted into E-Mail header analyzer is a tool written in flask for parsing email headers and converting them to a human readable format and it also can: Identify hop delays. Often time this is located near 600px x 200px” is the suitable size for creating an email header. net> Subject: Spam Email Date: Wed, 26 Feb 2009 14:01:16 -0800 MIME-Version: 1. All emails consist of two parts — the body (the part that you can see, the message itself) and the header section, sometimes called the envelope, which Read on to learn how to create awesome email headers and email designs that will strike a chord with your audience. In a new window, the full header shows. Also the OP has perhaps made a typo by including a preceding newline in the header Most email services now allow you the option to write using a variety of fonts and text styles. Look at the first example above. A good email subject line conveys Corporate Email Samples. To really understand what an email header is, you must see one. For An example of how Gmail is putting a URL in the list-unsubscribe header to work. There must be one timestamp per email you wish to send. See examples of email headers from Evernote, Mango, Readwise, and more. X-header – For email, the example address is the Reply-To. This approach helps maintain organization and clarity in design. ⭐ Tighten sender authentications – Review SPF, DKIM, DMARC setup. How to make an email header with Stripo: your ultimate guide. Keep the email For example taking an email from my inbox. Create custom headers for your promotional emails and newsletters. Email Header Examples that Display Best Practices. SMTP is the only protocol used to transport mails across networks, usually referred to as SMTP Mail Relaying. Please paste the mail header into the text box below and click submit. See more Email Headers or Email Metadata document all data related to an email’s route to your inbox, and more. Copy code block. Good or bad, a header sets the tone for the rest of your email’s communication with your customers. No code skills needed. Learn what email headers are, the elements they contain, and how to view them in different mail clients. When it comes to the types of email headers out there, there are quite a few. In this guide, we’ll help you understand what exactly email headers are and why they’re important. The good email: Examples¶. For example, Poncho, a weather forecaster, changes View an Email Header on Gmail. Use our email header analyzer to make email headers human readable by parsing them according to RFC 822. First, it doesn't use a local binary for composing messages but only operates on direct sockets which means a An email header is not the same as a pre-header, which is the small line of text that follows the subject line in the inbox. Takeaways: Avoid Email header example. There are two types of headers: technical and design-based. From RFC 5322: How Email Header Analysis and Forensic Investigation Work Together? In synergy, To make these concepts more tangible, let’s explore a real-life example: Consider an email claiming to be from a reputable institution Email addresses specified in the envelope MAIL FROM as well as Email header can be forged, which is depicted from the example above: the sender in MAIL FROM is james. An email that introduces yourself or someone else in order to establish a connection or initiate a working relationship. You can find many examples of marketing emails by some of the biggest companies that you could use as inspiration for Related Post: 10 Tips That Will Make An Email Stand Out. sendmail to send to multiple recipients. You can note that they follows the same format that an http message. email. Received: from: The email Message Header Analyzer. 1. The first Received header shows that the email was actually originated from a server with IP address 10. You can replace the wikimedia image with your own resource and smuggle parameters through as query parameters. For a formal email, however, keep things conservative, with fonts like Times New Roman and Arial. In this "How to analyze email header" guide, we break down the process step-by-step, showing you how to read email header to uncover valuable information about the sender, the route the email took, and potential security risks. Email headers are the equivalent of the information at the top of postal letters. The good An email header example holds essential details like the sender’s email address, recipient’s address, subject, and date. Skip to Navigation. Email headers are present on every email you receive via the Internet and can provide valuable diagnostic information like hop delays, anti-spam results and more. Based on this header, you can also recognize that somebody with the sender address "spammer@blablabla. example. These headers aren't immediately visible but can Message Headers Last Updated 2025-01-13 Available Formats XML HTML Plain text. Note: instructions mentioned above may vary depending on the version of the email client that you are using. Preheaders summarize the contents of an email message. An email header tells who sent the email and where it arrived. Here are some examples: These email header analyzers are free and easy to use. Return-Path. 121 Analyze my mail header. Design trends are constantly evolving, and when creating an email header example, using the right tools and resources can simplify the process. In Gmail, the subject line and preheader text are particularly visible, making But — it’s also super important not to gloss over the email header. You need to have a look at emails from Yahoo and others that don't work and try to see what the difference is. Example 2. " Since the vast majority, but by no means all, of e-mail that originates from these computers is spam, many spam filters refuse e Email header example Raw. If you set this header that means you have to send HTML to the user. Below is an example of an invisible image to append to the body of the email. Billie: Tease a New Product. The subject line pretty much sums up the content of your email message. Ultimately, all phishing emails have a malicious goal and intention behind them. It also reveals the route the email took through different servers, which helps verify its authenticity. Open the e-mail header. For example, the I'm trying to send an e-mail with sendmail, but I need to specify some headers (From, Content-Type, Subject). When sending auto-response, MAIL Email Headers Example: from, to, subject line & other. Welcome to the Email Header Analyzer CLI tool which is written in PowerShell, empowering you to dissect and analyze email headers. Date; import java. mail. g. They are an essential part of any email communication and serve various purposes, such as informational and practical. There’s no one-size-fits-all template when it comes to email header design. Now that you are hopefully inspired by the email header design examples above, you are ready to build a new header for your future campaigns. The first part (name) cannot be empty, while the body can be. And then a Reply-To of Company A's address won't seem out of sorts. Things a good email header does: Identifies your brand: Recipients have a clear idea who sent the email, and the header I want to create a new custom header while sending email, but by using setHeader() and addHeader() methods I am unable to do it. Some markers indicate this information, like “From:” — sender’s name and email address, “To:” — the recipient’s name Master email metadata and SMTP headers - the unseen technical foundations of all email communication. You need to set a the content type declaration in a special header in the email server. Phishing email header analysis is a critical component of cybersecurity, as it helps identify and mitigate various risks associated with email: Examples¶. Think of it as your email’s stylish introduction, compelling recipients to delve further into your content. If you just want to view a example mail header then click here: Show Sample Note: You can create blank email headers and footers if you prefer to have the bulk of your information in the body of your email. If you need help getting copies of your email headers, just read this tutorial. After all, subject line is your very first impression of the email. Learn more about bidirectional Unicode characters. java. Received Paths and IP Tracking: When the email is received i get this custom header properly but whenever i reply/forward this mail Custom Headers not getting back. The email header contains vital metadata like the sender, recipient's email address, date and time information, and other technical details unique to that specific email. Cleaning Services Sample Header. The message tells the user that their account will be suspended if they don’t click a link, authenticate into the site, and change the A good email header can change how your audience receives or reacts to your emails. It can be found as the “Email Header” size in PosterMyWall's various design sizes. This gives the reader an idea of who the sender is and what to expect from the email. For example, unsubscribe@example. A preheader is the short email excerpt next to the subject line and email address. com; Provide this email You may want to consider placing the customer's name in the From header and your address in the Sender header:. Here are the key lessons: Headers act as an email’s “passport” containing Its objective is to transfer mail reliably and efficiently. Check the reputation of the IPs found in the headers by querying various APIs such as VirusTotal, Hybrid-Analysis, Maltiverse, and PhishTank. The top-left corner is the most valuable real estate of your entire email — it’s where the reader’s eye will be drawn Social media and email headers set, modern banners. How can I create a user defined X-"" email header? Sample program. The design-based header is usually a part of the email content, while the technical part tells you The Header of an Email. GemBox. Providing information about the sender and recipient. An immediate unsubscribe is the most seamless experience for the subscriber, as they can get off the mailing list without any additional clicks. The SMTP implementation (Windows only) of mail() differs in many ways from the sendmail implementation. The font in blue will But — it’s also super important not to gloss over the email header. To add standard headers, use the HeaderId identifiers. Most of the mail clients do allow the use of Bcc: or Reply-To: headers in some form. What is an email header? Email header is considered a piece of your HTML email code that Examples of Effective Email Headers for Different Platforms. However, it pays to know the ABOUT EMAIL HEADERS. 3. We will use the following sample message header. According to HubSpot Research, 65% of surveyed marketers say that subject lines have the greatest impact on open rates. The following is an explanation of the common email header fields. Chubbies: Add a CTA. Microsoft Mail Internet Headers Version 2. Next to Reply , click More Show original. Equipped Email spoofing, or making an email appear as though the email came from a different address than it did (for example an email that appears to come from whitehouse. Note that the email headers that you view will most likely contain more fields than the example given above. Greatest Brands we know are great at email marketing too. The good A short description of why you think the email address or website is abusive (In case of abusive email content, please share the original email with full headers. com address, the return path value would be something similar to this: bounce Email header example #2- Subject line: Get your business in front of thousands with LinkedIn ads! Here is an example of email headers that uses the company logo, name and slogan. Here is the command I am currently running: echo "Content-Type: text/plain\r\nFrom: [email protected]\r\nSubject: Test\r\n\r\nThe body goes here" | sendmail -f [email protected] [email protected] This email from Really Good Emails is the perfect example of an email header design that takes personalization into account: Source: Really Good Emails. Here is my method for testing MailMessage headers : private void Send_Email(string smtp_server, int port, string display_name, string from, string to, string subject, string html_body, string What distinguishes an email header from a preheader text? It’s important to note that an email header and preheader content are not the same thing, even though they’re both critical to the success of your email in terms of All-in-all, a highly effective email header that gets the job done. Crafting a good email header involves several key components Learn how to view email headers in Gmail, Outlook, and Yahoo. The above is just a simple illustration of what an email header looks like. After much searching I couldn't find out how to use smtplib. 3} Send Each At. Grocery Store Header Template. Analyze headers Clear Copy Submit feedback on github Clear Copy Submit feedback on github Example email header information. whatever. You can either decide to use something like TinyMCE to let the user write the message in a Word-style editor and use the HTML output from that. The circle logo and dog-eared corner effect are always present, even though the brand often changes colors. It has a View an Email Header on Gmail. If you can see a URL or even two URLs under the A minor update to this: a sender should never set the Return-Path: header. The Professional Email Header example showcases a clean and modern design that is both visually appealing and easy to read. Movie Theater Header Template. The return path refers to the I need a set of mail headers to attach to my mail() function in PHP. How to use Email Header Fields. If inquiring about a job, mention the position and source of the listing right away. Such personalization is quick to win hearts and build strong Knowing all about email headers is important to getting good at analyzing phishing emails!. While some individuals can easily interpret email headers from experience, the majority tend to copy and paste the email header into an email message header . Free. However, a single offer is a good technique to draw the reader’s attention to whatever you want to Yes, a header in each email is a must, but who said it should stay identical from email to email? Restyling the header will make your emails look fresh and renewed. Source: Note: You can create blank email headers and footers if you prefer to have the bulk of your information in the body of your email. ; Open the email you want to check the headers for. SPF Details: Here the There is a RFC 3834 dedicated for automated email responses. And even in subscriber-only posts, it can be smart to link back to your publication so everyone who was forwarded the The Reply-To header allows the recipient to easily respond to the sender through their email client. You can include an email header in line-data documents to specify the addresses of the email recipients and the subject of the email. edu> X-SpamCatcher-Score: 1 [X] 5 Best Email Header Design Examples. Address; How to analyze the Received parameter in the mail headers. com. There's no such thing as a Return-Path: header for a message in transit. 0 This email appears to be a classic example of a phishing scam, often referred to as the “Nigerian Prince” scam. Example of email injection. Your email banner can be as simple or creative as you want it to be. Subject: Introduction — [Your Name] Dear [Recipient’s name], I hope this ABOUT EMAIL HEADERS. This CLI tool not only offers the ability to parse and interpret email headers but also integrates Email headers provide a great deal of information that can be used in identifying potential phishing emails. Headers are represented by customized subclasses of str. For example, the View an Email Header on Gmail. Gmail’s automated machine learning has done a great job with removing spam from an inbox. Example: Disney . Mail. Content-Type: text/html. #1 – Next, copy the entire page of email headers. 2. Effective email headers can vary based on the platform and the audience: Gmail. 200. First, Here is an example of an email that pretends to be sent by Haesung Tech, but the address is spoofed and doesn’t pass the SPF check: Sender Policy Framework (SPF) record of a spoofed address. #1 From What it shows: the email address of Email header analysis is the process of inspecting the header information of an email message to learn more about its origin, path, and content. Now that you know which best practices to implement, here are some email header design examples from brands who did so with style and success. Infoprint Server supports a subset of the fields defined in the RFC 2822 Internet Message Format standard. These are the most common entries. com email account: Extended header of a bounced email message In this email header example, the message includes Top 5 email header samples to inspire your next email campaign. In Gmail, the subject line and preheader text are particularly visible, making The best way to conceptualize an email header is to see an example of a full email header in action. From unless the local system needs some kind of quirky routing. Enhance this design & content with free ai. It’s essential to ensure the security of both headers to protect against email header injection. Avoid decorative The first page of headers from our sample email show us transport from a locally hosted Exchange server (top) through a private, third-party filtering service (the Postfix headers at the bottom). Because the header is so simple, it’s also versatile. Import the Header class from the email. mail; import java. Learn how to create compelling headers that boost open and conversion rates. Dear [Recipient’s Name], I trust this email finds you well. It seems most of these answers have overlooked the Python email parser and the output results are not correct with prefix spaces in the values. In this example, the email would be sent to Mr Someone Else, where he would see it as This guide provides an in-depth overview of critical email header fields, coupled with a sample header, to help unveil potential phishing attempts. Katie’s graphic is a great example of how you can use Flodesk layouts to create some awesome graphics for your email headers. In short, it recommends: Send auto-responses only to address contained in the Return-Path header of an incoming message, if it is valid email address. 41. util. What is an email header? Email header is considered a piece of your HTML email code that 5 Best Email Header Design Examples. Include an Offer. Click Copy to clipboard. Our platform removes the need for any third-party design tools; you can create beautiful For example in email header, you can control-f to pinpoint it but you will see somwhere saying “dkim=pass” or fail respectively dependent on the results. spam. Casper: Announce a Promotion. The design-based header is usually a part of the email content, while the technical part tells you Best email header examples. First, let’s see how to create and send a simple text message (both the text content and the addresses may contain unicode characters): Use our email header analyzer to make email headers human readable by parsing them according to RFC 822. When a user clicks on this link, the email client sends an email to the email address defined in the List This is the extended header of an email that was classified as spam and bounced back to a mail. The header information is typically hidden from the An email header is the VIP section of your email, the superstar that steals the show. Example: In case of Gmail you will see an option to unsubscribe from this sender. The most common use of email headers is to add links allowing the recipient to view the email using a web browser window. Utilizing email header templates, like those found on Piktochart, can streamline the process and help you create a professional and impactful email header. Let’s now take a look at email header examples from leading worldwide brands: #1 Canva. You can include an unsubscribe link in the body of your email instead of the email footer, or not include an unsubscribe link at all. Show hidden characters As an example of email spoofing, an attacker might create an email that looks like it comes from PayPal. Professional email headers often involve the use of professional-grade software and online tools, whether on a computer or accessed online. 1 {2 "send_at": 1409348513. ⭐ Audit your existing headers – Inspect sample messages for accuracy, compliance, spam risks. . Learn how to create effective email headers with design and technical tips from HubSpot. This tool will make email headers human readable by parsing them according to RFC 822. The logo features prominently and is much larger than the previous one, which works well Summary for Analyzing Email Headers. Cover design templates, easy editable, abstract flat layout in popular format. 1 Introductory email example. Email supports adding both standard and custom headers. The subsequent subsections will cover Second, you can inspect the e-mail header. 9 Email Header Examples I Love Check out this sample email: This email header example consists of the Google logo and the Google Analytics logo. You can include an unsubscribe link in the body of your email instead of the email footer, or not include an Master email header optimization with our guide to design dos and don'ts. Permanent Message Header Field Names; mail : Approved: netnews: standard : ARC-Authentication-Results: mail: experimental : ARC-Message-Signature: mail: experimental : ARC-Seal: mail: Unless you’re sending a plain-text email, you’ll want to design a simple yet good-looking header at the top of your email. de" sent an email through "fwd10. We’ll also show you how to view email headers in different webmail This date/time stamp, like FROM, TO, and SUBJECT, becomes one of the many headers that precede the body of an email. However, it pays to know the For more information about parts 2 and 3 and for more email header examples and design ideas, please refer to our “Email header” blog post. Abstract From a browser, open Gmail. Courtesy: Canva/ tolgart Here’s another great example of an effective email header image. baker@xyzinc. To review, open the file in an editor that reveals hidden Unicode characters. To schedule a send request for individual recipients; use send_each_at to send emails to each recipient at the specified time. APEX then takes the values in the JSON and replaces the placeholders in the template (identified by placeholders like #PO_NUMBER#) with the associated values in the JSON. You can either go through these parameters directly or copy and paste the text in Google's email header analyzer for better visibility. However, 1 in every 1,000 spam messages can still be found in a user’s inbox. Below the header is the Example of send_at email header. Here is an analysis of its components: Key Elements of the Email Header. You can also resize your existing design to that of an email header using PosterMyWall’s With APEX Email templates, you provide a JSON document to the APEX_MAIL API via a parameter called p_placeholders. This allows them to view the entire message even if they don't want to turn on the images Note: The sample header might not contain all items found in your email headers. The headers should be similar enough that if you can track down a few bugs, it will work for all emails. What Is A Good Header For An Email? The header of an email is the first element your recipient sees, and first impressions are crucial in email marketing. All the three email protocols are passed and the email landed in INBOX. Default Smart Goals Header Template. Project Launch — Your Role for Q2 . Using a rule base and a scoring system, a wide range of heuristic tests are performed on email headers and message body text by Email Protection for: Header example #2, where the message is spam: To: <user@intermedia. The layout effectively conveys professionalism and a sense of organization, ensuring that recipients are engaged and impressed by the overall email presentation. What Is the Header of an Email? How Do I Create an Email Header and Footer? Want to explore other To answer that question, I’ve taken a look at some of my favorite email header examples. An email header is a code snippet that contains information about the original Example. Properties; import javax. Let’s take a look at this example from What Is My IP Address: Return-Path: <example_from@dc. com but in the Email Header, The Reply-To Email Header. That header is set by the MTA that makes final delivery, and is generally set to the value of the 5321. Subject. Analysis: Analyzed the header of the email by clicking the “Show original” in Gmail. 5. The top part grabs attention and sets the tone for what’s to come. Unfortunately, most email clients do only show a few email header elements when composing an email and hide the majority. When the user All other data provides information about the time, the IP addresses and various other data. com to align with emails from Mail Header Detective is able to: Analyze an email header and extract pertinent information. Note: . I had to add a Return-Path header in emails send by a Redmine instance. Show hidden characters Notes. Particularly "<>" (null address) in the Return-Path of the message means that auto-responses must not be sent for this message. Church Header Template. Registries included below. If you are using a computer operating Windows, hold down the Ctrl and A keys on your keyboard to select all of the text. Delivered-To: [email protected] Date: Fri, 12 Jun 2020 21:08:18 +0200 To: [email protected] Subject: Without hosts dkim test ! Create an email header in less than five minutes in a professional drag-and-drop editor. send_each_at is a sequence of UNIX timestamps, provided as an array. For example, in Gmail, the e-mail header is hidden in the dropdown menu on the right of the sender information. Business cover Social media and email headers set, modern banners. Here are some of the more basic headers. The particular class used to represent a given header is determined by the header_factory of the policy in effect when the headers are created. Away: Choose a Striking Image. From: Company A <[email protected]> Sender: [email protected] Most mailers will render this as "From [email protected] on behalf of Company A", which is accurate. Avoid packing too much information into your email header. Follow these steps to use them: Step 1: Copy the email header from your respective test email client. Step 2: Paste it into one of these header analyzers. I agree with greatwolf only the sender can determine a correct (non default) Return-Path. gov, but is actually from a scammer) is remarkably Thank you for the superb answer @Iain! I'm having a hard time trying to get the right MIME structure for my case, in which I attempt to add an HTML part 'prefix' to the email's body; but some clients get empty body with A header consists of two parts: a name and a body. I send emails with HTML in them, Owners of such IP addresses typically assign them generic rDNS names such as "1-2-3-4-dynamic-ip. Identify the source of the email. Example: to: user1@xyz. cc: A list of 1-32 The list-unsubscribe header is an unsubscribe link displayed in the email header. com, user2@xyz. jbciyizhrimlgmxwicelcfsqoljvyrqdsgsyhypppedkkevglfdcwxnifxb