Re: Updated Dovecot 2.3.0 now getting 2 strange log errors

On 02/01/18 14:07, Stephan Bosch wrote:

...

I can see 21:21:38 is when the below errors showed up with the above 21:21:38 timestamps:

Dec 29 21:21:38 lmtp(recipient@domain.net)<17187>: Error: program `/usr/sbin/sendmail' was forcibly terminated with signal 15 Dec 29 21:21:38 lmtp(recipient@domain.net)<17187>: Error: sieve: msgid=470c210f-bd19-f63f-45ed-bfef59322be9@domain.email: failed to send vacation response to sender@domain.email: <Failed to execute sendmail> (temporary error) Dec 29 21:21:38 lmtp: Error: postdrop: warning: mail_queue_enter: create file maildrop/868503.17337: Permission denied

It still isn't really clear to me why this is going on.

I am wondering what that sendmail process is doing.

As you can see, Dovecot waits for it to finish for 30 seconds (override with submission_timeout setting).

Can you try invoking sendmail manually from command line? Does it work? Is it hanging for more than 30s?

I think the real error here is the postdrop one (sendmail is a wrapper around postdrop). It's a permission denied error which leads me to believe it may be an selinux (or similar) issue. I wouldn't be surprised if sendmail works from the command line but fails when executed from sieve because selinux has it blocked for sieve.

If you're running selinux or apparmour or similar, check your logs for that (audit log for selinux) and look for denials. You cna also try setting selinux to permissive and trying the operation (setenforce 0).

Peter