Good morning,

Our PRTG server started alerting us to the following.

IP on DNS blacklist (IP on DNS Blacklist) Down  (Error checking bl.spamcop.net, it contains an entry for 127.0.0.1 )

Also, emails sent from Office 365, some at not getting through.

watchdog.wmf.de gave this error:
Decision Engine classified the mail item was rejected because of IP Block (from outbound normal IP pools) -> 550 40.107.14.123 blacklisted at bl.spamcop.net

Appears bl.spamcop.net have not renewed their domain?

What can we do about it, the WHOIS info doesn’t provide any way of contacting the domain owner, due to it being withheld for privacy reasons.

Well, to be honest, I don’t know.

I don’t think there’s anything we can do about it at the moment.

I posted this on this forum because I am a KPN customer. And I think the provider should undertake action, because they - KPN in my case - use the SpamCop blacklist.

Yeah I think your right, I’ve reported it to Microsoft as its causing them issues on Office 365. Will let you know if I hear anything.

Is er iemand van KPN die dit heeft meegelezen?

Wij van Wned.nl hebben dit probleem kunnen omzeilen met een fix op alle servers. Wij kregen ook erg veel klachten binnen dat klanten niet alle mail meer binnen kregen. Alle hosters en providers hebben hier dus last van. Erg vervelend allemaal.

Had a notification from our PRTG sever to say the blacklist has been removed. Does it seem ok to you guys now?

Ben de hele middag al aan het zoeken geweest en had spamcop verwijderd uit mijn mailserver. Ik zag ook onterecht mails rejected worden. Was alleen wat lastig te vinden of de oorzaak nu bij mij of bij spamcop zat. Toen ik zag dat hun webserver ook niet meer was te bereiken leek het duidelijk. Ik kon echter niet veel vinden over andere mensen die vergelijkbare issues hadden .

Ik heb spamcop zojuist weer toegevoegd aan de configuratie en het werkt weer goed.

Probleem lijkt inderdaad te zijn opgelost.
Problem seems to be solved.

Office 365 appears to be still having issues.

watchdog.wmf.de rejected your message to the following email addresses:

Your message couldn't be delivered because it's suspected of being spam. For best practices when sending email, refer to the guidelines found here: https://go.microsoft.com/fwlink/?LinkID=526654.

watchdog.wmf.de gave this error:
Decision Engine classified the mail item was rejected because of IP Block (from outbound normal IP pools) -> 550 40.107.8.105 blacklisted at bl.spamcop.net