[syslog-ng] log smtp mail messages to a specific file

[Thanasis]

So, a more compact (and more efficient) edit would be:

# diff syslog-ng.conf.orig syslog-ng.conf
15a16,19
> filter mail {
>     facility(mail);
> };
>
22a27
> destination mail { file("/var/log/mail.log"); };
31,32c36,37
< log { source(src); destination(messages); };
< log { source(src); destination(console_all); };
---
> log { source(src); filter(mail); destination(mail); flags(final); };
> log { source(src); destination(messages); destination(console_all); };

Thank you (both) for your suggestions (and warnings)!
;-)