Hi Me again!

Occasionally (two or three times a week), I have a problem where
outgoing smtp emails give a 420 TCP read error. The email is then put
in a deferred folder which repeatedly trys (and succeeds) to resend
the email. I use ImailDS on the BM server which relays for our GW 6.5

I've tried increasing the SMTP timeouts and threads on the GWIA. I've
also contacted my ISP. None helped.

I have seen one example of this issue which seemed to suggest that the
problem was due to the firewall blocking port 113. Apparantly, some
smtp mtas try and connect back to the sending mta before they give a

This is where I found this:

Any ideas?