On 11/2/2019 3:20 PM, John Schmerold wrote:
https://mxtoolbox.com/diagnostic.aspx reported a six second connection
time, with total transaction time of nearly 9 seconds, so I dug into
the issue. I suspect I have rbl issues (perhaps too many):
postscreen_dnsbl_sites =
cbl.abuseat.org*2,dnsbl-1.uceprotect.net,zen.spamhaus.org*2,bl.spamcop.net*2,psbl.surriel.com*2,spamrbl.imp.ch*2,noptr.spamrats.com*2,escalations.dnsbl.sorbs.net*2,bl.score.senderscore.com*2,bl.spameatingmonkey.net*2,rbl.realtimeblacklist.com*2,dnsbl.dronebl.org*2,ix.dnsbl.manitu.net,b.barracudacentral.org,truncate.gbudb.net*2,bl.blocklist.de,sip-sip24.xxx.invaluement.com
postscreen_dnsbl_threshold = 3
Logs say:
Nov 2 15:07:58 stl-mx postfix/postscreen[31774]: CONNECT from
[52.55.244.91]:25071 to [206.196.118.234]:25
Nov 2 15:08:04 stl-mx postfix/postscreen[31774]: PASS NEW
[52.55.244.91]:25071
Nov 2 15:08:04 stl-mx pmg-smtp-filter[2151]: starting database
maintainance
Nov 2 15:08:04 stl-mx postfix/smtpd[3017]: connect from
keeper-us-east-1b.mxtoolbox.com[52.55.244.91]
Nov 2 15:08:06 stl-mx postfix/smtpd[3017]: NOQUEUE: reject: RCPT from
keeper-us-east-1b.mxtoolbox.com[52.55.244.91]: 554 5.7.1
<t...@mxtoolboxsmtpdiag.com>: Relay access denied;
from=<supert...@mxtoolbox.com> to=<test@mxtoolboxsmtpdiag$
Nov 2 15:08:06 stl-mx pmgpolicy[2902]: SPF says pass
Nov 2 15:08:06 stl-mx postfix/smtpd[3051]: NOQUEUE: reject: RCPT from
mail-oln040092072060.outbound.protection.outlook.com[40.92.72.60]: 450
4.1.1 <emoel...@stlucasucc.org>: Recipient address rejected:
unverified address: Recipient add$
Nov 2 15:08:07 stl-mx postfix/smtpd[3051]: disconnect from
mail-oln040092072060.outbound.protection.outlook.com[40.92.72.60]
ehlo=2 starttls=1 mail=1 rcpt=0/1 quit=1 commands=5/6
Nov 2 15:08:07 stl-mx postfix/smtpd[3017]: disconnect from
keeper-us-east-1b.mxtoolbox.com[52.55.244.91] ehlo=1 mail=1 rcpt=0/1
quit=1 commands=3/4
What is the best way to troubleshoot this issue?
--
John Schmerold
Katy Computer Systems, Inc
https://katycomputer.com
St Louis
I grepped mail.log and found that escalations.dnsbl.sorbs.net &
rbl.realtimeblacklist.com were throwing off quite a few "Host or domain
name not found. Name service error for name" error messages, so now I'll
need to find a way to keep an eye on this issue.
New mxtoolbox stats:
SMTP Connection time: 0.719 seconds
SMTP Transaction time: 2.656 seconds
