Effective maximum mailto: body lengths

The standard doesn’t define a maximum length, leaving implementation up to browsers and mail clients (See IETF RFC 2368). Microsoft products do have set limits: IE GET limit is 2,083 http://support.microsoft.com/kb/208427 Outlook express: 456 characters http://support.microsoft.com/kb/q182985/ Other browsers are likely to work up to lengths beyond that of a reasonable email body. The iPhone doesn’t … Read more

What is the behavior difference between return-path, reply-to and from?

Let’s start with a simple example. Let’s say you have an email list, that is going to send out the following RFC2822 content. From: <coolstuff@mymailinglist.example> To: <you@example.com> Subject: Super simple email Reply-To: <coolstuff-threadId=123@mymailinglist.example> This is a very simple body. Now, let’s say you are going to send it from a mailing list, that implements VERP … Read more

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