Am Fri, 23 Jan 2026 22:51:47 +0000
schrieb Michael Wise via mailop <[email protected]>:

> S3150 == throttling, possibly daily limit.

Nope, we got HARD 571 rejects stating the IP is on a blocklist.

Example:

Jan 23 14:45:55 asterix postfix-submit.asterix/smtp[2332 F2697C0234:
to=<********@live.com>,
relay=live-com.olc.protection.outlook.com[52.101.41.184]:25, delay=1.6,
delays=0.11/0/1.3/0.16, dsn=5.7.1, status=bounced (host
live-com.olc.protection.outlook.com[52.101.41.184] said: 550 5.7.1
Unfortunately, messages from [157.161.12.116] weren't sent. Please
contact your Internet service provider since part of their network is
on our block list (S3150). You can also refer your provider to
http://mail.live.com/mail/troubleshooting.aspx#errors. [Name=Protocol
Filter Agent][AGT=PFA][MxId=11BCB328DD4BDAAB]
[BY1PEPF0001AE1B.namprd04.prod.outlook.com

Mit freundlichen Grüssen

-Benoît Panizzon-
-- 
I m p r o W a r e   A G    -    Leiter Commerce Kunden
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