'451 Temporary local problem - please try later

[Umpol]

Hello All,

I've got a problem with sending email from outlook. I've got an error message like below.

An unknown error has occurred. Subject 'email subject by me', Account: '[email protected]', Server: 'xxx.xxx.xxx.xxx', Protocol: SMTP, Server Response: '451 Temporary local problem - please try later', Port: 587, Secure(SSL): No, Server Error: 451, Error Number: 0x800CCC6A

and below is mainlog from exim.

2009-08-13 17:27:23 1MbXWk-0007uv-P1 H=125.24.66.79.adsl.dynamic.totbb.net (mydomain) [125.24.66.79] F=<[email protected]> temporarily rejected after DATA: unknown ACL verb "check_message" in "check_message"

My server detail
Centos 5.2
clamav-0.95.2
SpamAssassin
MailScanner

How should I do to fix this problem ?

Thank you
Umpol

 

[smtalk]

Try http://help.directadmin.com/item.php?id=51 and enable spamassassin+clamav again.

 

[Umpol]

Thank you that's work. may I know what is cause of this problem.