I've been wondering since sometime ago if IMail has a serious bug: when a particular domain has an MX record with priority 0 the record is ignored by IMail, if also an A record doesn't exist for the domain it bounces the message with the Unknown host error message.
That would be very bad, if it is true.
It's my understanding that 0 is the highest priority possible, if I'm right IMail it shouldn't discard it at all.
That is correct.
No, no, no. I certainly hope Ipswitch doesn't do this. There are plenty of other things that should take priority (such as not allowing people to block bounce messages without knowing it, not letting people be an open relay without knowing it, etc.).Besides that, IMail it's not able to deliver mail to an MX record who's address is an IP, not a name, I know that the RFC indicates that has to be a name but many admins don't know or by mistake include the IP in those records...
Note that this 'accept the bogus E-mail' attitude has cost us (and all other mailserver AV companies) a huge amount of time, as a lot of new Outlook vulnerabilities have been discovered where Outlook will accept attachments that aren't really there according to the RFCs.
The RFCs are there for a reason, and should be followed unless absolutely necessary. I see no reason to accommodate a situation that has two problems: First, the DNS admin doesn't know DNS, and second, the DNS admin is using software that lets him enter bogus information. That's where the problem is, that that's where the problem needs to be fixed.
It's also important to note that with E-mail the RFCs are becoming much more important in dealing with spam; lots of companies spew out legitimate E-mail from poorly designed mailservers (often even from webservers). As people are getting stricter with spam, these mailservers need to be fixed.
Because of the spam/virus problems, it's time to become stricter, not less strict.
-Scott
---
Declude: Anti-virus, Anti-spam and Anti-hijacking solutions for IMail. http://www.declude.com
---
[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/
