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kyrkon

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Hi,

When i send emails from my kerio server, to the message header at the receiver i look something like the below:

Received: from mailserver.mydomain.com(unknown [xxx.xxx.xxx.])
by spam.xxxxx.com (Postfix) with ESMTP
for <testing<_at_>xxxxx.com>; Fri, 27 Nov 2009 19:07:37 +0200 (EET)
Received: from localhost ([127.0.0.1])
by mailserver.mydomain.com (Kerio MailServer 6.6.2)
for testing<_at_>xxxxx.com;
Fri, 27 Nov 2009 15:36:53 +0200



Is this unknown a problem or not?


Regards,

Kyriakos

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TorW

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The receiving mail server can't find a reverse DNS name for your IP, thus reporting "unknown" and the HELO string from you. Qmail and (I think) postfix does that. It's not a problem as such, but many mailservers will refuse your mail unless your server name and IP can be resolved both ways.

If you do have reverse DNS for your server, then the receiving server isn't attempting to reverse resolve you.

[Updated on: Mon, 30 November 2009 11:57]

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kyrkon

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Thanks TorW for your reply.

The problem is that...sometimes and from some users when they try to reply to my emails i can not receive the email. When they send me a new email i can get it.

So, if i understand your reply, i have to ask from my internet provider for a reverse DNS entry for my IP?


Regards,


Kyriakos
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freakinvibe

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Yes, it is recommended that your provider configures a PTR record for your IP address.

Dexion AG - The Blackberry Specialists in Switzerland
https://dexionag.ch
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TorW

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As freakinvibe says: the netblock owner must provide the PTR record for your A-record. Since you (unnecessarily) mangled the IPs in the header above, it's hard to say who it is.

Regarding the lost replies: check that the Reply-To address in your account setup (or the Outlook connector) is correct and that the address in it (if any) is working.

[Updated on: Mon, 30 November 2009 17:02]

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