Since upgrading to 0.40, I’ve started having problems with internal forwarding. I get 'Delayed Mail" notifications that start like this:
<email@example.com> (expanded from <firstname.lastname@example.org>): lost connection with 127.0.0.1[127.0.0.1] while sending end of data -- message may be sent more than once Reporting-MTA: dns; mail.example.com
Messages directly to accounts (rather than forwards) work fine, and outbound is OK too. In logs I’m seeing lots of these entries in mail.err:
Jan 15 06:22:06 mail spampd: WARNING!! Error in process_request eval block: Child server process timed out!
and occasionally these in mail.log:
Jan 15 07:10:31 mail2 postfix/smtpd: warning: restriction `reject_authenticated_sender_login_mismatch' ignored: no SASL support
I don’t know if these are related to this internal forwarding issue. The server has 8 cores & 8G, so there is plenty of capacity available. Any idea what might be causing this?