CatchAll Solution -> X-Envelope-To : [destination:user]

[n07cH0k]

Hi, is there any way to read the mail tags and adjust the destination user based on the content?
If I have a CatchALL address and want to deliver to the correct user based on eg. 'X-Envelope-To'.

[christianbur]

I just thought of something.
Of course you could write a program that does exactly this, but it would also have to work using sieve (target mailbox must support sieve). Getmail retrieves the emails from the CatchAll-mailbox and after Getmail has transferred the email to Dovecot, you can do a lot of things with sieve rules.
With the "redirect" parameter of Sieve you can forward emails.

sieve examples: https://doc.dovecot.org/configuration_manual/sieve/examples/

Mailcow: E-Mail->Configuration->Filters->add custom prefilter for target mailbox.

require ["fileinto","regex","body","envelope","subaddress"];

if header :contains ["To","X-Original-To"] ["[email protected]", "[email protected]"]
{
    redirect "[email protected]";
}