fail2ban@ email bouncing on tertiary MX

Beiträge: 2
Registriert: 2. Apr 2016, 01:12

fail2ban@ email bouncing on tertiary MX

Beitrag von bwooce » 20. Okt 2016, 11:06

Hi team,

I know your server is moving and you've been busy e.g.
"Please remember: the are unreachable by: 19.10.2016 18:00 +0200 to 20.10.2016 12:00 +0200 (1h left)." on the front page [1hr left? for the past 5 hours I've looked at it?]

However your tertiary MX server is not behaving nicely. The main one's are back now so it's not relevant right now.

[MX records] 800 IN MX 70 HAS ISSUE 800 IN MX 10 -- GOOD 800 IN MX 20 -- GOOD

It looks like webserver3 mail server is misconfigured. If you wanted to make it a null MX then 550 isn't a good error code to be returning (perm failure):
Oct 20 08:08:41 nexus postfix/smtp[14352]: 0986E28407FA: to=<>,[]:25, delay=19500, delays=19133/0.01/367/0.14, dsn=5.1.1, status=bounced (host[] said: 550 5.1.1 <>: Recipient address rejected: User unknown in virtual mailbox table (in reply to RCPT TO command))

Cheers and keep up the good work,


Beiträge: 397
Registriert: 14. Sep 2010, 11:54

Re: fail2ban@ email bouncing on tertiary MX

Beitrag von Martin » 20. Okt 2016, 11:57

Hi bwooce,

it comes from the datacenter-move :-(
I have fixed it now.
Thank you.
Mfg Martin Fail2Ban Reporting Service