In some domains, I create email forwarding lists with all emails from the domain, for example [email protected], and each user of this domain receives a copy of the email sent. In some cases, I need to limit that only 1 user can send to this list, and also limit that external users cannot send to this address. How to make?
Don't setup E-Mail Forwarding then. Just create a mailbox and setup a sieve rule for this mailbox to handle this with a condition filter. Something like this should do the trick (Be aware this is untest, you need to test this for yourself): Code: if address :is "from" "[email protected]" { setflag "\\Seen"; fileinto "INBOX"; redirect :copy "[email protected]"; redirect :copy "[email protected]"; redirect :copy "[email protected]"; redirect :copy "[email protected]"; } else { discard; stop; } Usefull ressources: https://doc.dovecot.org/configuration_manual/sieve/examples/ https://www.fastmail.help/hc/en-us/articles/360058753794-Sieve-examples https://support.tigertech.net/sieve
