On 2014-12-26 12:59 pm, Mike Burger wrote:

On 2014-12-26 12:39 pm, Robert G. (Doc) Savage wrote:

...

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?

I would suggest looking at the mailer daemon logs on both the sending and receiving systems. It would appear that the sending system is having difficulties at the receiving system end.

You will likely find the root of your issues in the log entries for that message (or those messages) that occurred over the 5 days in question.

PS: "Connection timed out with example.com" is the first thing I'd look at.

-----Original Message----- From: Александр Кириллов nevis2us@infoline.su Reply-to: CentOS mailing list centos@centos.org To: CentOS mailing list centos@centos.org Subject: Re: [CentOS] Fail2ban mail failures ??? Date: Fri, 26 Dec 2014 21:30:39 +0300

Robert G. (Doc) Savage писал 2014-12-26 20:39:

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?

Check your /etc/fail2ban/jail.local /etc/fail2ban/jail.conf. You have to provide valid email addresses for dest= and sender= parameters in sendmail-whois or mail-whois actions for enabled jails. os.org/mailman/listinfo/centos

Александр Кириллов,

I should have made it clear that this is all on one machine. The jail.conf file is the default from the fail2ban package. It used to work perfectly, but now has the mail problem. All I've had to do for years is install the fail2ban package, start it, and make it autostart whenever I reboot. Now it's misbehaving in a way that puzzles me.

--Doc Savage Fairview Heights, IL