Mail Server Setup With Exim, MySQL, Cyrus-Imapd, Horde Webmail On Centos 5.1

Hello and thanks for the howto. I've been using this mailserver setup for a few years now, but recently I noticed that some of the recipients MTA reject messages when sent from an email client like Tunderbird or Outlook Express.
The difference between a message sent from a client and the one sent from horde is in the Sender name.

From Horde is correct - [email protected]
From mail a client is wrong - "[email protected]"@mail.example.com, where mail.example.com is the hostname of my mail server.
The complete line in log file (real user and domains changed):

Code:

2010-08-10 11:37:07 1OikKS-0002Tp-M2 <= "[email protected]"@mail.example.com H=([192.168.1.103]) [93.152.157.42] P=esmtpa A=plain:[email protected] S=984 [email protected]

I googled for a few days untill I found no solution to this problem.
Please help if you have any ideas.

 

Did you set the correct sender address in your email client?

 

Everything is set in the client. I use other mail servers for other accounts and they work fine with similar settings.

 

You could have just searched howtoforge this issue is answered here http://www.howtoforge.com/forums/showpost.php?p=159154&postcount=83

 

Thanks! That solved it. I should have searched howtoforge instead of Google, you're right.