553 errors

[Shannon @ shaw]

I didn’t really ask for a simple answer...
It’s not so much the understanding, it’s more like laziness. It’s a mail server I built in 1998 and rebuilt/upgraded in 2006 and it pretty much just sits there and runs.
I don’t have to look at it a lot. So my skills are not ‘fresh’.

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I was browsing through maillog but there’s so many properly rejected mails it’s kind of depressing.
such as:

Oct 19 00:12:56 mail sm-mta[27488]: ruleset=check_relay, arg1=[101.200.123.160], arg2=127.0.0.4, relay=[101.200.123.160], reject=550 5.7.1 Rejected: 101.200.123.160 listed at sbl-xbl.spamhaus.org
 

When I grep’d maillog for the problem domain none found – but maybe too big of a delay between it happening and being reported to me...

 

 

Thank You!!!

 

Shannon Wheeler

 


From: Dennis 
Sent: Wednesday, October 19, 2016 2:42 PM
To: Shannon @ shaw 
Subject: Re: 553 errors

Hi,

Yes, you have a misconfiguration.  That you are asking the question means, with all due respect, that your understanding of how mail servers work is probably not sufficient for a simple answer.  But to give you one anyway, there is some problem with the MTA (mail transport agent) you are using being able to verify the recipient address.  You should be looking in the logs produced by your MTA for more details.

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Dennis Mathiasen


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From: Doug
Sent: Wednesday, October 19, 2016 5:17 PM 
To: Shannon @ shaw 
Subject: Re: 553 errors 

Check your maillog file in /var/log for error messages for that email.  There should be something helpful there.