For privacy reasons, I want to set up a mailing list that hides the names and email addresses of the posters and replaces them by some display name (similar to the function of a web forum). It is not necessary for a valid per-user email address to be shown in the from field, just not their real ones (so showing "no-reply@lists.example.com" would be fine, better would be $user@members.lists.example.com then I can configure a forward to their real email adresses).

Example: There are three users: "John Snow <john-snow@stark.got>" with display name "Bastard" "Tyrion Lannister <tyrion@lannister.got>" with display name "Dwarf" "Daenerys Targaryen <daenerys@targaryen.got>" with display name "Khaleesi"

So, any mail to the list with "From: John Snow <john-snow@stark.got>" should be forwarded as "From: Bastard <bastard@great-kingdom.got>", mails with "From: Tyrion Lannister <tyrion@lannister.got>" should be forwarded as "From: Dwarf <dwarf@great-kingdom.got>", and finally, mails with "From: Daenerys Targaryen <daenerys@targaryen.got>" should be forwarded as "From: Khaleesi <khaleesi@great-kingdom.got>".

Which mailing list softwares would support this?

I checked GNU Mailman, GroupServer and PhpList, all three of them seem not to support this.

Regards, Bodo

PS: I know that I can/have to handle forwarding the mails from great-kingdom.got using aliases outside of the mailing list software, so that part is out of scope of this question.

Not going to use to send unsolicited bulk emails? Hmm....

I don't need Mailman & CO for spam. That's what telnet is for. And even if I wanted to use it for sending spam, then I would just send the mail from a fake address to the list and then log in as moderator and approve the message.

I really need it so users on the list can post without other users on the list seeing their real names and email addresses but instead seeing nick names. Like you calling yourself »c0wb0y« which probably is not your real name.

Regards, Bodo

Ok. Seems you already know what to do.

Did you see any indication that I pretended >>c0wb0y<< is my real name?

What you are proposing to do is called "spoofing." It's not something that nice internet users do.

More to the point, even if you can spoof the email address in the "From," you won't be able to spoof the email's path through the inner tubes as documented in the email headers, so it's pointless.

If you are addressing legitimate security needs on the part of your proposed mailing list participants, look into means of encrypting the emails. Alternatively, start a forum.

Remember, though, unless you decide to move to the Dark Web, the internet is ultimately a public place.

Ok, so bottom line: After 45 years of mailing lists, I need to code my own mailing list software to support even the most trivial stuff.

Anyways, thanks for the help.

It is not hard to remove the "received-from" headers and rewrite the "From" line in the body of the email.

https://major.io/2013/04/14/remove-s...-with-postfix/
http://wiki.bluelightav.org/display/...e+From+headers