I have set up MailStation for mail archiving and for storing qurantine mails, processed by a linux based firewall/spam solution.
This works works very well, except from some unwanted filtering in MailStation, in spite of the spam-filter is disabled:
Jun 13 20:22:05 s_sys@firewall postfix/qmgr: 1A2B3C4D5E: from=<firstname.lastname@example.org>, size=232672, nrcpt=2 (queue active)
Jun 13 20:22:27 s_sys@firewall postfix/smtp: 1A2B3C4D5E: to=<email@example.com>, firstname.lastname@example.org[www.xxx.yyy.zzz],delay=3747, status=deferred (host mailstation.com[www.xxx.yyy.zzz] said: 450 4.1.8 <email@example.com>: Sender address rejected: Domain not found (in reply to RCPT TO command))
The Synology CS407e with the MailStation add-on package is placed behind a firewall that only accepts SMTP from the firewall/spam solution, so I realy doesn't need any filtering at all.
Is it possible to disable all filtering and checks