I'm using fail2ban with CentOS 6.6. Something is causing fail2ban's alerts sent to root's mail to be rejected. Here's a clip from one of the error messages:
Message 48: From MAILER-DAEMON@lion.protogeek.org Sun Dec 21 03:09:20 2014 Return-Path: MAILER-DAEMON@lion.protogeek.org Date: Sun, 21 Dec 2014 03:09:19 -0600 From: Mail Delivery Subsystem MAILER-DAEMON@lion.protogeek.org To: postmaster@lion.protogeek.org Content-Type: multipart/report; report-type=delivery-status; boundary="sBL97EKS003880.1419152959/lion.protogeek.org" Subject: Postmaster notify: see transcript for details Auto-Submitted: auto-generated (postmaster-notification) Status: R
Part 1:
The original message was received at Tue, 16 Dec 2014 03:09:17 -0600 from localhost with id sBG97E83025627
----- The following addresses had permanent fatal errors ----- fail2ban@example.com
----- Transcript of session follows ----- fail2ban@example.com... Deferred: Connection timed out with example.com. Message could not be delivered for 5 days Message will be deleted from queue ..........
I used to get the messages that are now being deleted after five days. Any suggestions?
--Doc Savage Fairview Heights, IL