Messaging Gateway

 View Only
  • 1.  Reverse DNS does not match SMTP Banner - Messaging Gateway

    Posted Sep 02, 2011 10:53 AM

     Hi everyone, I had a problem with Messaging Gateway. When I run the SMTP scanner on mxtoolbox.com this result came up.

    OK - 190.12.x.x resolves to mx.xxxx.com.ar
     Warning - Reverse DNS does not match SMTP Banner
     0 seconds - Good on Connection time
     Not an open relay.
    1.123 seconds - Good on Transaction time
     

    What can I do from Messaging Gateway to solve this situation?

    THX to all.



  • 2.  RE: Reverse DNS does not match SMTP Banner - Messaging Gateway

    Posted Sep 06, 2011 04:43 PM

    Thanks for using our Diagnostics Tool. This warning can mean one of two things!

    1) Your SMTP Banner and rDNS record do not match. In a perfect world these would match and/or resolve to the same Fully Qualified Domain Name (FQDN). More Details

    2) Your SMTP Banner is Masked. More Details

    Again, thanks for using our tools. We are constantly working to make them bigger and better all for free!

    @mxtoolbox



  • 3.  RE: Reverse DNS does not match SMTP Banner - Messaging Gateway

    Posted Sep 06, 2011 06:24 PM

    You can customize your banner (a.k.a SMTP Greeting) on the "Protocols -> SMTP -> Settings" page.

    This may help remove this warning if its important to you.



  • 4.  RE: Reverse DNS does not match SMTP Banner - Messaging Gateway

    Posted Sep 16, 2011 08:27 AM

    I have change the SMTP Greeting with mx.xxxx.com.ar but we are still having this problem.

    The following image is the section were the change was made.



  • 5.  RE: Reverse DNS does not match SMTP Banner - Messaging Gateway

    Broadcom Employee
    Posted Sep 16, 2011 11:29 AM
      |   view attached

    You haven't shown us the full report, so it is hard to say what the issue is. Please see this screen shot of a random test I ran:

     



  • 6.  RE: Reverse DNS does not match SMTP Banner - Messaging Gateway

    Posted Sep 16, 2011 12:02 PM



  • 7.  RE: Reverse DNS does not match SMTP Banner - Messaging Gateway
    Best Answer

    Broadcom Employee
    Posted Sep 16, 2011 12:11 PM

    You have a Cisco firewall with mailguard turned on. This masks your SMTP banner with *********, which does not match mx.soporteconectar.com.ar.