Mails from microsoft exchange email services are failed in plesk (qmail). Upon investigation we found that the grey list filter in plesk 10 is blocking server that are on “dsl|pool|broadband|hsd” address ranges. In this case it would be Microsofts cloud anti-spam service that is on “pool” addresses.
Some Microsofts cloud anti-spam servers are;
co9outboundpool.messaging.microsoft.com db8outboundpool.messaging.microsoft.com db9outboundpool.messaging.microsoft.com am1outboundpool.messaging.microsoft.com
Log entries are like this
Sep 26 09:51:42 mail001 qmail-queue-handlers: from=MyDummyName@Dummydomain.com Sep 26 09:51:42 mail001 greylisting filter: list type: black, from: co9outboundpool.messaging.microsoft.com, match string: dsl|pool|broadband|hsd Sep 26 09:51:42 mail001 qmail-queue-handlers: handlers_stderr: REJECT Sep 26 09:51:42 mail001 qmail-queue-handlers: REJECT during call 'grey' handler
From the Plesk control panel there are very few settings for the greylist filter like turn the filter on/off and manage white/black list entries.
The following command will show the configuraton for the gery list filter
We will get more information to configure grey list filter using ‘-h’ option
We can solve the problem by whitelisting “*.messaging.microsoft.com” in “White domains patterns list” using the following command
/usr/local/psa/bin/grey_listing --update-server -domains-whitelist "add:*messaging.microsoft.com"
The mails from Microsoft exchange email service will work fine after that.
You can refer Parallels Knowledgebase Article for How to configure Greylisting