Your outbound server should be specified in the reverse lookup, in my opinion. There are many conflicting views of this, but when a receiving mail server is set to check a reverse lookup, it is going to check to see if the sending host matches that specified in the reverse.
Now, some mail servers are more forgiving than others and look only to see if the IP matches, but I have had mail servers be so picky as to make sure not only the IP matches, but also the host name. And, I've found it happens more often than not lately.
There is no need to worry about these "super strict" anti-spam programs. There are a lot of people out there that think they have found the "Final Ultimate Solution to the Spam Problem" (see http://www.rhyolite.com/anti-spam/you-might-be.html ). The problem, though, is that while about 1 out of 500 mailservers runs some kind of wacky anti-spam system, if you try to jump through hoops to get your mail to one of them, you're just as likely to break something that will prevent you from sending to another.
If you have a reverse DNS entry for the IP that your mailserver sends from (and it is set up properly, so that the hostname resolves back to the same IP), then you are all set. Don't worry about whether the HELO/EHLO comes close to matching the reverse DNS; just so long as it too has an A record (or MX record), you're all set.
-Scott
---
Declude JunkMail: The advanced anti-spam solution for IMail mailservers since 2000.
Declude Virus: Ultra reliable virus detection and the leader in mailserver vulnerability detection.
Find out what you've been missing: Ask for a 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/
