Hi
I have problem with my mail server , when mails are sent from a particular client from Another server, there mails are getting bounced, and the error is pasted below.

Please let me know where is the problem? I dont have problem any other domains sending mails to my mail server.

Warm Regards
Ganeshh
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Thu 2005-08-18 15:53:55: MX-record resolution of [x.com] in progress (DNS Server: x.x.x.x)...
Thu 2005-08-18 15:53:56: * P=100 D=x.com TTL=(1058) MX=[mail.domain.com] {x.x.x.x}
Thu 2005-08-18 15:53:56: Attempting MX: P=100 D=x.com TTL=(1058) MX=[mail.x.com] {x.x.x.x}
Thu 2005-08-18 15:53:56: Attempting SMTP connection to [x.x.x.x: 25]
Thu 2005-08-18 15:53:56: Waiting for socket connection...
Thu 2005-08-18 15:53:56: Socket connection established (10.0.0.199 : 1137 -> x.x.x.x: 25)
Thu 2005-08-18 15:53:56: Waiting for protocol initiation...
Thu 2005-08-18 15:54:25: * Error: 30 second wait for protocol timeout exceeded.
Thu 2005-08-18 15:54:25: This message is 60 minutes old; it has 0 minutes left in this queue
Thu 2005-08-18 15:54:25: Primary queue lifetime exceeded; message placed in retry queue
--- End Transcript ---
: Message contains [1] file attachments

have you added the -Rt0 tweak?

take a look at this:
http://faq.sw-soft.com/index.php?ToDo=view...Id=322&catId=61

and this:
http://forum.sw-soft.com/showthread.php?threadid=25778