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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 ...
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.
However, the SMTP envelope sender address will contain the name of the Gmail account used to send the message. Thus the underlying Gmail account address remains readily available: it will typically appear in a "Sender:" header field, or occasionally in the subject field. Some mail clients will write "From: Sender@gmail.com [mailto:Sender@gmail ...
RFC 5322 specifies the syntax of the email header. Each email message has a header (the "header section" of the message, according to the specification), comprising a number of fields ("header fields"). Each field has a name ("field name" or "header field name"), followed by the separator character ":", and a value ("field body" or "header ...
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.
In the Sender Policy Framework (SPF), the domain-name in the envelope sender remains subject to policy restrictions. Therefore, SPF generally disallows plain message-forwarding. In case of forwarding, the email is being sent from the forwarding server, which is not authorized to send emails for the original sender's domain. So the SPF will fail ...
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.
Messages forwarded through an email alias retain the original SMTP envelope sender and recipient. If the message is a blind carbon copy, the recipient can only tell whether the message was forwarded through the alias by examining the message headers. However, the standard does not mandate mentioning the envelope recipient in the headers.