SwiftSusan wrote on Wed, 10 May 2006 14:31:01 -0700:

As of today I cannot send e-mails to above domain, I am @ntlworld.com, I
can send e-mail to anyone else. My friend @homecall.co.uk can send me
e-mail and other people, When I send e-mail to @homecall.co.uk (I have
tried 3 accounts) it is returned immediately with the following message :
Reporting-MTA: dns; mtaout01-winn.ispmail.private.ntl.com
Arrival-Date: Wed, 10 May 2006 21:45:07 +0100
Received-From-MTA: dns; aamtaout02-winn.ispmail.ntl.com (81.103.221.35)

Final-Recipient: RFC822;
Action: failed
Status: 5.1.1
Remote-MTA: dns; mx0.123-reg.co.uk (195.224.48.120)
Diagnostic-Code: smtp; 550 relay not permitted
Anyone any idea's ? any help would be gratefully appreciated


Looks like NTL's server is sending to 123-reg.co.uk, and their mail server
is rejecting it. I've run nslookup here for homecall.co.uk MX servers, and
it should be sent via Tiscali - looks like NTL's DNS is retrieving the wrong
MX record info (could be that homecall.co.uk has moved it's MX relays from
123-reg to Tiscali recently, and NTL's DNS is still caching the old
records). Try and get to support at NTL to clear their DNS cache for
homecall (good luck! NTL and support don't go well together in the same
sentence unless there's a "no" or "useless" in there too :P)

Dan