Email - Address

1 - About

An email address is a Internet identifier of an email sender and/or receiver.

3 - Syntax

3.1 - Base

The inbox email identifier contains:

  • a locally interpreted string followed by the at-sign character (“@”)
  • followed by an Internet domain name in a dot-atom form. The domain portion identifies the point to which the mail is delivered (either a host name or a mail exchanger name).

[email protected]

3.2 - Tagged

Email server may support the addition of tag after the local-part where the local part and the tag are separated by a + or -

This tag then serves generally for routing or analytics purpose.

Example:


[email protected]

The email provider or SMTP server must support email tags. To check, just send an email to [email protected] is delivered to the email [email protected].

4 - Set

An address can be specified as:

  • the (envelope) sender- This is the address where delivery problems are sent to. (f option with sendmail)
  • the author (From:)

5 - Rewriting

As for URL, you can also rewrite an email address, meaning that the email will be delivered to the email server but at another email address.

Example: Postfix

6 - Validation

7 - Documentation / Reference


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