If have this in rsyslog.conf already: mail.* -/var/log/mail.log
So I already disabled synchronous. Will try a reboot, thanks! Laurens -----Original Message----- From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] On Behalf Of Viktor Dukhovni Sent: donderdag 23 oktober 2014 18:16 To: postfix-users@postfix.org Subject: Re: warning: psc_dnsbl_request: connect to private/dnsblog service: Resource temporarily unavailable On Thu, Oct 23, 2014 at 04:06:55PM +0000, Viktor Dukhovni wrote: > She DGRAM socket is likely the syslog socket. I'm not seeing any > dnsblog processes listening on the actual dnsblog socket. > > You have to dig deeper, but may lack the skill to do so... I can't > spoon-feed you through this one step at a time. :-( Restarting Postfix or rebooting the machine may sweep the problem under the rug. Perhaps your syslog service is congested, if so, make sure you're not doing synchronous logging. -- Viktor.