I've seen this happen many times with hosting companies that host virutal domains. For instance, the receiving mail server may be 'mail.mydomain.com' and the MX may point to the same host, but the reverse will be something like 'webguys.bestdomainhosting.com'. Another common problem I find with a hosting company is that 'mail.mydomain.com' will be setup as a CNAME record, which is BAD!
What throws people on this is that many times these domains will recieve mail from people using services such as Yahoo, AOL, MSN and the like, or from those that setup their mail server so it is extremely forgiving. So, they believe the problem to be yours and not theirs. You will also see intermittent email delivery to these domains and what I often see is DNS timeouts. Try as I might in these cases, I seldom can convince the receiving end that they need to have their hosting company fix this. In one case I had a vendor we could not get emails to tell me their DNS entries could not be the problem because they were sure their hosting company knew more about DNS than I did. To this day we cannot consistently send emails to them because the hosting company will not fix the DNS for the domain, but have no problems sending to domains that once were a problem, but are no longer because they did fix it. ----- Original Message ----- From: "R. Scott Perry" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, November 24, 2003 18:13 Subject: RE: [IMail Forum] Some Errors > > >I don't think you are alone. I've personally seen emails bounced back to > >me from address I know for a fact are real. > > That is very common. That will happen if: > > [1] The domain you are sending to has a broken MX record, that points to > one or more hosts that don't accept mail for the domain, or > [2] The domain you are sending to has anti-spam software that is blocking > your mail (with or without good reason), or > [3] IMail's "Using-the-A-record-instead-of-MX-record" bug is occurring. > > The log file entries and the Mail Test tool at http://www.DNSreport.com are > useful in narrowing down which it is. > > > -Scott > --- > Declude JunkMail: The advanced anti-spam solution for IMail mailservers. > Declude Virus: Catches known viruses and is the leader in mailserver > vulnerability detection. > Find out what you've been missing: Ask about our free 30-day evaluation. > > --- > [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)] > > > To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html > List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ > Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ > To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
