==== Required information ====
- iRedMail version: 0.5.1
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): Mysql
- Linux/BSD distribution name and version: CentOS release 5.8 (Final)
- Related log if you're reporting an issue:
46B95238ADA     4280 Fri Dec 14 11:38:55  MAILER-DAEMON
(connect to mx1.securebank.com[10.42.23.11]:25: Connection timed out)
message@securebank.com

====

I see some mails in my mailq from MAILER-DAEMON like the one bellow, they remain in the mailq. And in the logs i see if like a back-scatter mail. is there a way to block this type of mails??? How can i stop them? I have filtered some Ip blocks from which i got those mails.

46B95238ADA     4280 Fri Dec 14 11:38:55  MAILER-DAEMON
(connect to mx1.securebank.com[10.42.23.11]:25: Connection timed out)
message@securebank.com

Dec 14 12:18:08 mail postfix/smtp[31007]: connect to mx1.securebank.com[10.42.23.11]:25: Connection timed out
Dec 14 12:18:08 mail postfix/smtp[31007]: 46B95238ADA: to=<message@securebank.com>, relay=none, delay=2353, delays=2323/0/30/0, dsn=4.4.1, status=deferred (connect to mx1.securebank.com[10.42.23.11]:25: Connection timed out)

thank you.