Hi again,
I'm migrating an old mx to Postfix. This instance will be responsible
for inbound-only emails for various domains.
Note that every domain can have one or more domain aliases. This is my
simplified config:
virtual_mailbox_domains = proxy:mysql:/etc/postfix/sql/domains.cf
virtual_alias_domains = proxy:mysql:/etc/postfix/sql/domains_alias.cf
virtual_alias_maps = proxy:mysql:/etc/postfix/sql/aliased_domains.cf
virtual_mailbox_maps = proxy:mysql:/etc/postfix/sql/mailboxes.cf
domains.cf returns the real domains
domains_alias.cf returns the real domain of a domain alias
aliased_domains.cf is similar to domains_alias.cf but prepends an "@"
before the returned domain.
mailboxes.cf returns the user address if it exists. NOTE: It contains
only the addresses of real domains (it doesn't contain the aliased domains)
I'm testing this configuration but there is some problem with non
existing users of aliased domains. Example follows:
postfix.giopan.dev is an alias of giopan.dev.
If I try to send an email to nonexist...@giopan.dev Postfix correctly
returns the error "Recipient address rejected: User unknown in virtual
mailbox table".
If instead I try to send an email to nonexist...@postfix.giopan.dev
Postfix accepts the email with the aliased domain, and pass it to the
transport (which of course returns an error because it doesn't recognize
the address) so it logs:
4ZCXGM6pdSz1Brt: to=<nonexist...@giopan.dev>,
orig_to=<nonexist...@postfix.giopan.dev>, relay=x.x.x.x[x.x.x.x]:24,
delay=0.16, delays=0.14/0/0/0.02, dsn=5.1.1, status=bounced (host
x.x.x.x[x.x.x.x] said: 550 5.1.1 <nonexist...@giopan.dev> User doesn't
exist: nonexist...@giopan.dev (in reply to RCPT TO command))
This generate a bounce, which is not what I expected. I thought that
virtual_mailbox_maps would check the resolved address BEFORE passing the
email to the transport (so that the email would not be queued and
blocked in the MX at the RCPT TO command), but it seems that's not
working. Reading the docs virtual_mailbox_maps is described as "Optional
lookup tables with all valid addresses in the domains that match
$virtual_mailbox_domains.", both alias and real domain are present in
virtual_mailbox_domains, so I'm not understanding what I'm doing wrong.
If I try to "$ postmap -q nonexist...@giopan.dev
mysql:/etc/postfix/sql/mailboxes.cf" nothing is returned, so the query
it's working as expected.
Thanks,
Gioele
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