Warning – Reverse DNS does not match SMTP Banner

I have no idea what mxtoolbox.com is trying to tell us.

In general practice, and as described in RFCs, it's okay for your server to identify itself as your server hostname as long as the server hostname's IP# has reverse DNS set up to the same server hostname.

If you really want each domain name to have it's own helo name, you can do that but then each domain name must have it's own IP# (no shared IP#s) and you must modify your exim.conf file so it can look up the doman-name/ip# pairs in a table YOU maintain manually and set up both the helo and the outgoing IP#.

This has been discussed previously in these forums.

Jeff
 
Its pretty simple the hostname that 173.239.3.92 resolves to is not the same as the one replying on port 25.

Either change your ptr record or change the hostname that exim replys with.
 
jlasman said:
I have no idea what mxtoolbox.com is trying to tell us.

In general practice, and as described in RFCs, it's okay for your server to identify itself as your server hostname as long as the server hostname's IP# has reverse DNS set up to the same server hostname.

If you really want each domain name to have it's own helo name, you can do that but then each domain name must have it's own IP# (no shared IP#s) and you must modify your exim.conf file so it can look up the doman-name/ip# pairs in a table YOU maintain manually and set up both the helo and the outgoing IP#.

This has been discussed previously in these forums.

Jeff
Click to expand...

I have Unique IP per domain
and I have list with the domains and IP's
/etc/virtual/infterfaces
domain.tld: 1.2.3.4
domain2.tld: 1.2.3.5
etc...

what is the right line on exim.conf ?
(or PTR Record: http://www.directadmin.com/forum/showthread.php?t=38172 )

Best Regards,
Star Network.
 
It appears you want me to search DirectAdmin forums for you. I don't have time to do it as a favor, and I don't need it for myself. Perhaps someone else will do it for you, but I'm guessing if anyone else responds it will be to tell you to search for it yourself. We're happy to do customizations to my newest SpamBlocker-Powered exim.conf file or the official DirectAdmin distributed exim.conf file, as a commercial service; if you're interested please contact me by email.

Look here for more information on your DNS and rDNS questions.

Jeff
 
Thanks!

I got the info about publish domains and IP's
but i didn't find relevant information about my problem
Reverse DNS does not match SMTP Banner (when rDNS is configured well)

Best Regards,
Shalom Burla.
 
You can only do this if each domain name has it's own IP#. The exim.conf file must be modified so it will look up the servername/ip# pair for each domain name, and send under that servername, from that IP#. Each IP# must have its own rDNS for it's hostname.

If any piece of that isn't done correctly it won't work.

There's no easy way for anyone to diagnose it through the forum, but if you want to give it a try, then first find and make the changes and then post the changes you've made.

Or perhaps hire someone else to make the changes for you if finding/implementing them is beyond your capability, or if you don't have the time or are otherwise unwilling to do it yourself.

If no one responds it's likely because no one has experience doing it.

Post the specific IP#/hostname pair that's not working and we can troubleshoot that.

Jeff
 
It will work with all SpamBlocker powered exim.conf files for DirectAdmin, both the older ones distributed by DirectAdmin, and the newest one, distributed by me.

Jeff
 
You must log in or register to reply here.
Back
Top