Grant:
> >> >> SUBJECT: Delivery status notification
> >> >> This is an automatically generated Delivery Status Notification.
> >> >> Delivery to the following recipients was aborted after 7 second(s):
> >> >> mas...@masked.com
> >> >
> >> > If you want that mail, whitelist them,
> >>
> >> They should already be whitelisted through my use of list.dnswl.org.
> >
> > Your SMTP server replied with 450. Either your configuration is
> > wrong, or some DNS lookups time out. Note the above text says:
> >
> > Delivery to the following recipients was aborted after 7 second(s)
> >
> > This could be a symptom of DNS lookup timeout.
>
> Something must be wrong with my config. In my log I can see that
> postfix is returning 450 to many more comcast.net messages than it's
Please show "postconf -n" command output (not cut-and-paste from
main.cf).
Please show one complete logfile record from "connect from" until
"reject" that demonstrates the problem (you may anonymize the email
address).
> >> I also have several of these:
> >>
> >> lost connection with mx1.comcast.net[68.87.26.147] while receiving the
> >> initial server greeting
> >> conversation with mx1.comcast.net[68.87.26.147] timed out while
> >> receiving the initial server greeting
> >
> > Your SMTP *client* also has problems. Consider monitoring your
> > packet loss rate. I run "mtr" from a cron job.
>
> Is it the sender's SMTP client that has problems?
Please show one complete logfile record (you may anonymize the email
address).
Wietse
