Mail server host name in greeting

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nfear24
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Mail server host name in greeting

Postby nfear24 » Sun Apr 01, 2007 10:13 am

according to dnsreports I am having this problem:
[QUOTE]If your mailserver sends out E-mail using this domain in its EHLO or HELO, your E-mail might get blocked by anti-spam software. This is also a technical violation of RFC821 4.3 (and RFC2821 4.3.1). Note that the hostname given in the SMTP greeting should have an A record pointing back to the same server. Note that this one test may use a cached DNS record.


domain.com claims to be host mail.domain.com[/QUOTE]
How can I go about fixing this in zimbra.


jholder
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Mail server host name in greeting

Postby jholder » Sun Apr 01, 2007 1:13 pm

Go into the admin ui, and there is an option to use ehlo for the domain. I can't remember if it's in the domain only, or global setting. . or maybe it's in the MTA tab
Anyway, it's there. You'll need to restart tomcat.
nfear24
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Mail server host name in greeting

Postby nfear24 » Sun Apr 01, 2007 2:42 pm

[quote user="jholder"]Go into the admin ui, and there is an option to use ehlo for the domain. I can't remember if it's in the domain only, or global setting. . or maybe it's in the MTA tab
Anyway, it's there. You'll need to restart tomcat.[/QUOTE]
Hmmm, I cant seem to find it anywhere in the admin ui.
nfear24
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Mail server host name in greeting

Postby nfear24 » Mon Apr 02, 2007 12:00 pm

Is there an option in a config file where I can change the HELO from mail.domain.com to domain.com.
Nicrad
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Mail server host name in greeting

Postby Nicrad » Mon Apr 02, 2007 10:43 pm

I'm have the same issue as this also, and I cant find anywhere you change the ehlo or helo in the AI.
Please can someone help use out here.
phoenix
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Mail server host name in greeting

Postby phoenix » Tue Apr 03, 2007 1:04 am

Surely the problem here isn't what your greeting is but whether you have a correct A record and/or reverse DNS that has your domain name in it. Postfix should identify itself as the FQDN of your zimbra server such as '220 xxx.domain.com ESMTP Postfix' where xxx is the machine name and domain.com is your domain name. That shouldn't cause you any problems, anything other than that might be considered 'suspicious' behaviour and could get you identified as sending spam.
Regards

Bill

Rspamd: A high performance spamassassin replacement

Per ardua ad astra
Nicrad
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Mail server host name in greeting

Postby Nicrad » Tue Apr 03, 2007 1:10 am

phoenix,
I posted this (http://www.zimbra.com/forums/showthread.php?t=8014) before I sore this post, and this was just a normal install. Let me know what you think. Thankfully this is only on a test box as my new production box should be here today (sometime) and I'll see how that goes.
Thanks
nfear24
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Mail server host name in greeting

Postby nfear24 » Tue Apr 03, 2007 8:31 am

[quote user="10330phoenix"]Surely the problem here isn't what your greeting is but whether you have a correct A record and/or reverse DNS that has your domain name in it. Postfix should identify itself as the FQDN of your zimbra server such as '220 xxx.domain.com ESMTP Postfix' where xxx is the machine name and domain.com is your domain name. That shouldn't cause you any problems, anything other than that might be considered 'suspicious' behaviour and could get you identified as sending spam.[/QUOTE]
I have a split dns setup. My A record on my zimbra machine points to the internal adress along with the mx record. So that is correct right. Then I have my domain.com being pointed to that machine, but the problem is that machine uses mail.domain.com and not domain.com.
domain.com claims to be host mail.domain.com That is causing the problem. If I could just edit the HELO it should be solved.
Thanks
phoenix
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Mail server host name in greeting

Postby phoenix » Tue Apr 03, 2007 9:09 am

So are you saying that you have no external DNS A record pointing to your server? What is 'this' domain' that seems to be causing this message from dnsreports?
Regards

Bill

Rspamd: A high performance spamassassin replacement

Per ardua ad astra
nfear24
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Mail server host name in greeting

Postby nfear24 » Tue Apr 03, 2007 9:45 am

[quote user="10330phoenix"]So are you saying that you have no external DNS A record pointing to your server? What is 'this' domain' that seems to be causing this message from dnsreports?[/QUOTE]
yes I also have an external DNS A record pointing to the server.
tickus.com is the domain.
Everything on my mailserver runs great except there is a couple places I cant send email do to this because of spam blocking.

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