What is the Return-Path for an email?


The Return-Path is an email message header that:

When the delivery SMTP server makes the final delivery of a message, it inserts the return-path header at the beginning of the mail data.

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What are email headers?

Email header are the most important part for email routing and this articles regroups the main logic about them
Gmail Show Original Email
What is a Email Message ? known as Internet Message or RFC822

An email is a document that is composed of the following structure * one or more headers * followed at the end by a body that may be composed of multiparts It's a network message known as: * MimeMessage *...
What is an SMTP reception?

SMTP has two sides, sending and receiving, this article is all about how to receive
What is the Email sender? (MAIL FROM, Envelop Sender, Bounce Address)

The sender is the mailbox to which notification messages are to be sent if there are problems delivering the message (bounce). The sender is the envelope address that was set during a SMTP transaction...

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