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I am looking for an e-mail server that can replicate the gmail plus addressing, however I would like to be able to replace the + with another character (_ or -) due to some plus haters

I would prefer a free solution that works on Linux, however I would be open to windows (server) and paid* solutions as well.

I would also add the requirements of IMAP and secure connections, but I hope that those are standard for any e-mail server by now.

*Paid solutions should be less than $50/yr, since at that price I would simply go to Google Apps and configure it like this

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up vote 3 down vote accepted

You can use Postfix:

  • free and open source
  • Linux/Mac
  • support plus-addressing: in your /etc/postfix/main.cfg file, add the line recipient_delimiter = +. More generally, it supports sub-addressing (term used by the RFC 5233) aka. address tags, i.e. you can change the + with another character.
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