> Exactly my understanding. Eh, no. I don't think you followed Len precisely.
> Further, it's my understanding that reverse checks done by other > mail servers on mail that we send looks at the sender domain in the > envelope of the email and the IP address of the machine sending the > email (also in the envelope) then does a reverse lookup on the IP to > see if it matches the domain. No, this is not the case. The PTR and the MAIL FROM: domain do not need to match (unless you are deliberately using mechanisms such as SPF and the remote server is checking your SPF records--not to confuse the issue, but this is an exception). > If it doesn't, they reject the email causing the "blocking call > cancelled" errors in the Imail SMTP log. I doubt you've established that this is the reason that the connection is dropped. > By default, Imail writes the virtual domain to the email > envelope... IMail echoes the virtual host's official host name in the EHLO/HELO greeting. You _do_ need to have an A record corresponding to the official host name. > ...and since we have multiple virtual domains, the IP never reverses > to that domain. That's not your problem. You surely are missing another ingredient: correctly delegated PTR; sender-IP-to-PTR-to-A-to-sender-IP mapping; extant A record for official host name; and extant A/MX record for envelope sender domain are other places to look. If you provide the real IP and DNS info, we can look into further from remote locations. --Sandy ------------------------------------ Sanford Whiteman, Chief Technologist Broadleaf Systems, a division of Cypress Integrated Systems, Inc. e-mail: [EMAIL PROTECTED] SpamAssassin plugs into Declude! http://www.mailmage.com/products/software/freeutils/SPAMC32/download/release/ Defuse Dictionary Attacks: Turn Exchange Addresses into IMail Aliases! http://www.mailmage.com/products/software/freeutils/exchange2aliases/download/release/ 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/
