Results 1 to 10 of 10

Thread: SMTP banner for several domains

  1. #1
    Join Date
    Apr 2008
    Posts
    8
    Rep Power
    7

    Default SMTP banner for several domains

    Hi,

    I'm adding second domain to my zimbra server. How (and where) I can change SMTP banner that emails from new domain too can pass spam checks?

    Thanks,

    -Aki

  2. #2
    phoenix is offline Zimbra Consultant & Moderator
    Join Date
    Sep 2005
    Location
    Vannes, France
    Posts
    23,587
    Rep Power
    58

    Default

    Quote Originally Posted by Akba View Post
    I'm adding second domain to my zimbra server. How (and where) I can change SMTP banner that emails from new domain too can pass spam checks?
    The SMTP banner is how the server responds to another MTA, why do you think you need to change it? It would help if you describe the problem you're having.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  3. #3
    Join Date
    Apr 2008
    Posts
    8
    Rep Power
    7

    Default 2 domains

    Ok.

    I have a server name domain-a.com

    then I have two email domains and addresses
    one@domain-a.com
    two@domain-b.com

    when I send an email from one@domain-a.com smtp banner reply is domain-a.com

    but when I send an email from two@domain-b.com smtp banner reply is still domain-a.com and that causes this email to be spam filtered on some servers.

    How to fix this?

    Thans,

    -Aki

  4. #4
    phoenix is offline Zimbra Consultant & Moderator
    Join Date
    Sep 2005
    Location
    Vannes, France
    Posts
    23,587
    Rep Power
    58

    Default

    Quote Originally Posted by Akba View Post
    but when I send an email from two@domain-b.com smtp banner reply is still domain-a.com and that causes this email to be spam filtered on some servers.
    That's not what your problem is, a sinlge SMTP banner is all you will get from any mail server and that's not a problem for multiple hosted domains. I have multiple domains on my server and have no problems sending email and none of them get rejected as spam.

    Without seeing any errors (or headers from an affected email) it's not possible to answer your question on why they're treated as spam, I'd hazard a guess that you have a DNS problem (no reverse DNS perhapas?).
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  5. #5
    Join Date
    Apr 2008
    Posts
    8
    Rep Power
    7

    Default

    I don't think that there is a DNS or reverse DNS problem.
    here are test results from MX Lookup Tool - Check your DNS MX Records online - MxToolbox on both domains and you see there is a problem on domain-b.com


    220 domain-a.com ESMTP Postfix

    Not an open relay.
    0 seconds - Good on Connection time
    0.671 seconds - Good on Transaction time
    OK - 81.xxx.xxx.xxx resolves to domain-a.com
    OK - Reverse DNS matches SMTP Banner

    220 domain-b.com ESMTP Postfix

    Not an open relay.
    0 seconds - Good on Connection time
    0.624 seconds - Good on Transaction time
    OK - 81.xxx.xxx.xxx resolves to domain-a.com
    Warning - Reverse DNS does not match SMTP Banner

    Thanks,

    -Aki

  6. #6
    phoenix is offline Zimbra Consultant & Moderator
    Join Date
    Sep 2005
    Location
    Vannes, France
    Posts
    23,587
    Rep Power
    58

    Default

    Quote Originally Posted by Akba View Post
    I don't think that there is a DNS or reverse DNS problem.
    here are test results from MX Lookup Tool - Check your DNS MX Records online - MxToolbox on both domains and you see there is a problem on domain-b.com
    I'll say it again, this is not likely to be a problem. If you are having a problem with some email being marked as spam then show us some headers or some error messages from the log files.
    Last edited by phoenix; 07-06-2010 at 07:08 AM.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  7. #7
    Join Date
    Apr 2008
    Posts
    8
    Rep Power
    7

    Default

    Ok. I try to get one from the person how gave me information that some of my emails are considered as a spam on their mail server.....

    Thanks,

    -Aki

  8. #8
    Join Date
    Dec 2006
    Location
    Minneapolis MN
    Posts
    777
    Rep Power
    9

    Default

    Quote Originally Posted by Akba View Post
    OK - 81.xxx.xxx.xxx resolves to domain-a.com
    Warning - Reverse DNS does not match SMTP Banner
    -Aki
    Your problem is right there. Note: this typically does not cause spam scores to go up, but it's the only "error/warning" related to SMTP banners in your output.

    Make sure that 81.xxx.xxx.xxx.xxx resolves to the same name in your SMTP banner (which should be the FQDN name of your server)

  9. #9
    Join Date
    Apr 2008
    Posts
    8
    Rep Power
    7

    Default

    How I can do this for two separate domains on same mail server?

    Thanks,

    -Aki

  10. #10
    Join Date
    Dec 2006
    Location
    Minneapolis MN
    Posts
    777
    Rep Power
    9

    Default

    The same mail server will have a single SMTP banner. Even Gmail has a single banner for the tens of thousands of domains they host. Like others have said previously, the banner is not your issue.

Similar Threads

  1. zmmailboxd keep crashing since 2h ...
    By Eno in forum Administrators
    Replies: 0
    Last Post: 06-03-2010, 02:24 PM
  2. SMTP relay/smarthost multiple domains
    By punky1402 in forum Administrators
    Replies: 1
    Last Post: 07-10-2009, 12:59 AM
  3. Multiple domains with multiple SMTP points of presence
    By fcolpron in forum Administrators
    Replies: 3
    Last Post: 09-08-2008, 12:46 PM
  4. New Installation - SMTP Error to outside domains
    By ldejongh in forum Installation
    Replies: 3
    Last Post: 08-08-2007, 08:21 AM
  5. need advice on configuring zimbra to work with fax server
    By pheonix1t in forum Administrators
    Replies: 0
    Last Post: 07-11-2007, 08:46 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •