>
>I have a subscriber who all of a sudden has been generating some error
>reports that I see, and the message is as follows (with the subscriber's
>address changed to protect the innocent):
>
>There was a SMTP communication problem with the recipient's email server.
>Please contact your system administrator.
>  <mail.dlhost.com #5.5.0 smtp;550 RCPT TO:[log in to unmask]>
>Relaying not allowed <mailto:[log in to unmask]> Relaying not
>allowed>
>

The server at mail.dlhost.com is the one refusing to relay mail to your
subscriber.  Without knowing the full address of them it's impossible to
tell if it's their own mail provider or an intermediate one.

Contact the administrators of mail.dlhost.com to find out why.  I sometimes
find that the refusing domain is actually a secondary MX (because the
primary was offline or unavailable) and they either aren't aware that
they're secondary (nobody told them) or they stopped relaying a long time
ago and didn't update DNS.


--
Regards,
 Michael Shannon
 Senior Consultant, Asia Pacific Region           [log in to unmask]
 L-Soft international, Inc.                     http://www.lsoft.com

 Chazzozz!!

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