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However, there are many similar email header fields that all contain sending party information; therefore Sender ID defines in RFC 4407 [4] a Purported Responsible Address (PRA) as well as a set of heuristic rules to establish this address from the many typical headers in an email. Syntactically, Sender ID is almost identical to SPF except that ...
In 1999 Hotmail included an X-Originating-IP email header field that shows the IP address of the sender. [1] [2] As of December 2012, Hotmail removed this header field, replacing it with X-EIP (meaning encoded IP) with the stated goal of protecting users' privacy. [3]
To use Unicode in certain email header fields, e.g. subject lines, sender and recipient names, the Unicode text has to be encoded using a MIME "Encoded-Word" with a Unicode encoding as the charset. To use Unicode in the domain part of email addresses, IDNA encoding must traditionally be used.
The recipient is informed that the sender is replying to a previous email in which they were given a task. QUE, meaning Question. The recipient is informed that the sender wants an answer to this e-mail. RB, meaning Reply By. Used with a time indicator to inform the recipient that the sender needs a reply within a certain deadline, e.g. RB+7 ...
This is a list of Simple Mail Transfer Protocol (SMTP) response status codes. Status codes are issued by a server in response to a client's request made to the server. Unless otherwise stated, all status codes described here is part of the current SMTP standard, RFC 5321. The message phrases shown are typical, but any human-readable alternative ...
The Sender: header is available to indicate that an email was sent on behalf of another party, but DMARC only checks policy for the From domain and ignores the Sender domain. [ note 2 ] Both ADSP and DMARC [ 4 ] reject using the Sender field on the non-technical basis that many user agents do not display this to the recipient.
bounce address - When an email can not be delivered, the MTA will create a bounce message and send it to the address given by the MAIL FROM command. Used in RFC 4406. return path - When the email is put in the recipient's email box, a new mail header is created with the name "Return-Path:" containing the address on the MAIL FROM command.
A user of a VBR email certification service signs its messages using DomainKeys Identified Mail (DKIM) and includes a VBR-Info field in the signed header. The sender may also use the Sender Policy Framework to authenticate its domain name. The VBR-Info: header field contains the domain name that is being certified, typically the responsible ...