SMTP banner for several domains

[Akba]

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

[phoenix]

Originally Posted by Akba

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.

[Akba]

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

[phoenix]

Originally Posted by Akba

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?).

[Akba]

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

[phoenix]

Originally Posted by Akba

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.

[Akba]

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

[Krishopper]

Originally Posted by Akba

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)

[Akba]

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

Thanks,

-Aki

[Krishopper]

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.