On Wed 22/Nov/2023 15:25:36 +0100 Otto J. Makela via mailop wrote:
Can someone shed light on a Microsoft/Outlook block list? Our hobby server
(on upcloud.com) seem to have been blocked for quite some time now.
At this time, SPF and DKIM should be correct for our outgoing messages.
Is there anything to be done, apart from switching to some mail sender
company instead of ourselves attempting a direct connection?
2023-11-15T08:27:37.762372+00:00 mail postfix/smtp[113710]: 7407B6274D:
to=<memberaddr...@hotmail.com>,
relay=hotmail-com.olc.protection.outlook.com[104.47.18.97]:25, delay=0.29,
delays=0.05/0/0.21/0.03, dsn=5.7.1, status=bounced (host
hotmail-com.olc.protection.outlook.com[104.47.18.97] said: 550 5.7.1
Unfortunately, messages from [SERVERIPADDRESS] 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.
[AM6EUR05FT032.eop-eur05.prod.protection.outlook.com 2023-11-15T08:27:37.743Z
08DBE4B9C5B508E7] (in reply to MAIL FROM command))
I used to have lots of those "550 5.7.1 Unfortunately, messages from
[94.198.96.74] weren't sent". It was caused by MIPSpace, #595 in Valli's
multirbl. The IP was already blocked when I got it, last April (but it doesn't
show up in queries, perhaps because it's private).
MIPSpace only accept delist requests from "a representative of the company
listed in the SWIP or rwhois", so I cannot even ask. I solved by using a relay
for M$'s domains.
Best
Ale
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