Hello to all Expert there...

Please help me to fix this problem below.

Thanksss...


From: "Mail Delivery System" <MAILER-DAEMON@henryvl.com>
To: <redufudooran@henryvl.com>
Sent: Wednesday, February 15, 2006 2:53 PM
Subject: Undelivered Mail Returned to Sender


This is the Postfix program at host henryvl.com.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The Postfix program

<quit@surtecphils.com> (expanded from <dccstaff@henryvl.com>): unknown
user: "quit"

<exit@henryvl.com> (expanded from <dccstaff@henryvl.com>): unknown
user: "exit"

Well, as the message is telling you, 'quit' and 'exit' are invalid users at surtecphils.com.

Looks to me like someone is trying to relay spam from your mailserver, and got a little confused with their SMTP commands. Looks like they tried to end the session whilst postfix was expecting an argument to "RCPT TO:". This may be from a scripted attempt.

Have you ensured your mailserver does not allow relaying from unknown hosts?