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Is there currently a Linux email server that will allow me to replicate how Gmail or Outlook allow aliases.

i.e. with Hotmail (which is now Outlook) or Gmail I can sign up on a site and use [email protected] and it will come to the [email protected] account without first having to set up an alias.

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  • The plus sign + can be part of any email address' local part. Automatically disposing seems something Hotmail specific to me that Gmail copied (or vv.)
    – Anthon
    Commented Feb 13, 2014 at 10:29

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This is typically called “plus addressing”. Most email servers can do it and were already doing it before GMail and Hotmail existed and copied that feature.

With Postfix, set recipient_delimiter in /etc/postfix/main.cf. This is in the default configuration as shipped by some distributions such as Debian and Ubuntu.

recipient_delimiter = +

With Exim, set a local part in /etc/exim.conf:

local_part_suffix = +* : -*
local_part_suffix_optional

The old Email addressing FAQ discusses some older MTAs including Sendmail and Qmail.

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