Note that your backup MX has no access to the list of mailboxes on
primary MX. All mail for any address @ your domain will be accepted,
nonexistent recipients will be bounce from the backup MX. This will
Ehm you mean from the primary server?
No. The backup MX will accept the mail, attempt to deliver it to the
primary, the primary will refuse to accept mail for a nonexistent recipient,
the backup MX will then bounce it back.
I have to setup an alias
and in the account of "foocatch" I need
with "| /usr/bin/maildrop" in it. Now what about the ~/.mailfilters/rcptfilter stuff?
That's something completely different, Courier invoking maildrop during an
SMTP session, not upon local mail delivery.
But does this mean, to let rcptfilter work, I have to install for EACH valid localpart a file