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Old 4th November 2011, 16:07
Dima_2005 Dima_2005 is offline
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Default Mail warning: hostname verfication failed

Hello,

In my log I see a lot of warnings like this:
Code:
Nov 4 11:42:28 backupserver postfix/smtpd[22340]: warning: 213.56.159.12: hostname mail.ch-lannemezan.fr verification failed: Name or service not known
What does it mean? Are those mails sent or did it fail? How to avoid these warnings?

Thanks
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Old 5th November 2011, 12:35
falko falko is offline
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Do you have valid nameservers in /etc/resolv.conf?
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Old 5th November 2011, 17:15
Dima_2005 Dima_2005 is offline
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I do,

my resolv.conf:
Code:
nameserver 8.8.8.8
nameserver 8.8.4.4
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Old 6th November 2011, 18:50
falko falko is offline
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Quote:
Originally Posted by Dima_2005 View Post
Hello,

In my log I see a lot of warnings like this:
Code:
Nov 4 11:42:28 backupserver postfix/smtpd[22340]: warning: 213.56.159.12: hostname mail.ch-lannemezan.fr verification failed: Name or service not known
What does it mean? Are those mails sent or did it fail? How to avoid these warnings?

Thanks
Is this one of your servers or a remote system?
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Old 6th November 2011, 18:51
Dima_2005 Dima_2005 is offline
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Quote:
Originally Posted by falko View Post
Is this one of your servers or a remote system?
it's a remote system. I think it's one of the emails that were sent... and this warning was present after sending the mail

EDIT: i think i found the problem. It's probably some spam-servers which try to send mail through my server ip. I've looked up some recent warning hostnames and found that most of them are actual spam IP's.
Although I have to say that it's a weird error for something like this, but ok.

Last edited by Dima_2005; 6th November 2011 at 20:10.
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