Well, I faced with exactly the same problem but we have MS SMTP server which is sux by BTW. Let's say you have some IP address block which is actually some subnet from a larger block of your provider's IP net. So e.g. you SMTP box have 111.222.333.444 address. Guess who "own" the domain 333.222.111.in-addr.arpa.net? Your provider for sure. First try to figure out which DNS provides Domain System Reverse Mapping for your particular subnet. I use Pingplotter (www.pingplotter.com) for this - ping your SMTP box => Right Click =>IP Block Lookup(ARIN). For example for me it's NS1.METRONET.CA. Then run NSLOOKUP, type "server NS1.METRONET.CA", then type "ls -t PTR 333.222.111.in-addr.arpa.net". You will see that your SMTP host is not there or the name is wrong. Call your provider - they should fix it. Good luck! Alex Klink Network Analyst
----- Original Message ----- From: "ANDREY FYODOROV" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, May 15, 2002 1:27 PM Subject: [IMail Forum] sending from virtual domain and reverse DNS lookup > Hi all. I have a customer who tries to send mail to this particular > destination that has a very strict mail server. The mail server checks to > see if the hostname after HELO has a valid PTR matching with the IP address > of our Imail server. > > Our server says HELO customerdomain.com and the receiving server says > something like "your DNS record does not match". There is a PTR for the IP > address of our server, but it resolves to our actual server's host name. > > Is there any way to make Imail announce itself using its own domain name > instead of virtual domain name? > > Thanks! > > Andrey Fyodorov > Senior Exchange Administrator > iNNERHOST > > > Please visit http://www.ipswitch.com/support/mailing-lists.html > to be removed from this list. > > An Archive of this list is available at: > http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ > > Please visit the Knowledge Base for answers to frequently asked > questions: http://www.ipswitch.com/support/IMail/ > Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Please visit the Knowledge Base for answers to frequently asked questions: http://www.ipswitch.com/support/IMail/
