>>>>> "Claudio" == Claudio Corvino <c.corvino81 at gmail.com> writes:> I have an external MTA configured with Postfix that delivers email to an internal IMAP/LMTP > Dovecot server configured to bind an LDAP to check if users exist.You should have postfix do the checking for whether or not users exist and then have postfix reject and deny the message. Then you don't care because the IP of the postfix server is almost certainly your MX server.> If the user does not exist, my MX sends a non delivery notification, > and into the e-mail there's the local IP address of the Dovecot > server.> I can't find a way to remove or hide that IP, here is an example of line that contains the IP > (with X) that I would like to hide/remove:> "The mail system> <user at domain>: host hostname.domain.com[XXX.XXX.XXX.XXX] said: 550"> Thanks in advance!> Cheers> -- > Claudio
>> I have an external MTA configured with Postfix that delivers email to an internal IMAP/LMTP >> Dovecot server configured to bind an LDAP to check if users exist. > > You should have postfix do the checking for whether or not users exist > and then have postfix reject and deny the message. Then you don't > care because the IP of the postfix server is almost certainly your MX server.Plus backscatter. Sending a fail notification back to the sender (vs rejecting) puts your mail server at risk of sending spam to email accounts that had their address forged. And thus maybe yoru server being added to a spam blacklist.
You're right, I think is the only way, or at least one of the simple method to accomplish this. I'll try, thanks! Regards Claudio Il mar 14 feb 2023, 19:35 John Stoffel <john at stoffel.org> ha scritto:> >>>>> "Claudio" == Claudio Corvino <c.corvino81 at gmail.com> writes: > > > > I have an external MTA configured with Postfix that delivers email to an > internal IMAP/LMTP > > Dovecot server configured to bind an LDAP to check if users exist. > > You should have postfix do the checking for whether or not users exist > and then have postfix reject and deny the message. Then you don't > care because the IP of the postfix server is almost certainly your MX > server. > > > If the user does not exist, my MX sends a non delivery notification, > > and into the e-mail there's the local IP address of the Dovecot > > server. > > > I can't find a way to remove or hide that IP, here is an example of line > that contains the IP > > (with X) that I would like to hide/remove: > > > "The mail system > > > <user at domain>: host hostname.domain.com[XXX.XXX.XXX.XXX] said: 550" > > > Thanks in advance! > > > Cheers > > > -- > > Claudio > >-------------- next part -------------- An HTML attachment was scrubbed... URL: <https://dovecot.org/pipermail/dovecot/attachments/20230214/d35aa921/attachment.htm>