Nicolas JEAN:
> ### Tests without randmap ###
>
> transport_maps = hash:/etc/postfix/local_transport_map
>
> Having "my.domain :" or "my.domain lmtp:unix:private/dovecot-lmtp"
> doesn't modify default behaviour (set by virtual_transport =
> lmtp:unix:private/dovecot-lmtp), and yields such a log line:
> to=<contact@my.domain>, relay=my.domain[private/dovecot-lmtp] ...
> dsn=2.0.0, status=sent
Note that you would get the exact same email delivery result with
a map that does not match your domain.
How would you tell the difference between a map that returns ":"
for your domain and a map that does not match your domain?
Not by looking at the mailog file.
> But having "my.domain virtual:"; for instance, changes the log line to:
>
> to=<contact@my.domain>, relay=virtual ... dsn=2.0.0, status=sent
>
> So the incoming email's domain /is/ matched against local_transport_map
> and the transport described there is used.
This is a DIFFERENT map that matches your domain.
> ### Test with randmap ###
>
> transport_maps = hash:/etc/postfix/local_transport_map
> randmap:{smtp:[relay1.com]:587, smtp:[relay2.com]:587}
>
> Adding randmap after local_transport_map (unchanged "my.domain :" line)
We know based on the above test that THIS UNCHANGED MAP either
returns ":" for your domain or it does not match your domain.
And now we know the difference:
> results in all incoming email being relayed to one of the randmap relays.
Conclusion: the map does not match your local domain, and therefore
Postfix queries the next map, which is the randmap.
Wietse
