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.
> 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.
Wietse
