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KC 9.3.1 patch 1 - mail queue increasing for x.pro.protection.outlook.com destinations only [message #150467]

Tue, 09 November 2021 12:26

Pete Mitchell
Messages: 12
Registered: February 2017

Anyone come across the following?
Upgraded from KC 9.3.1 to 9.3.1 patch 1 this morning. Upgrade went fine.
Since then, the outbound message queue keeps filling up with messages destined from mail accounts on Microsoft (xxx.pro.protection.outlook.com)
The message is "4.3.2 451 4.7.500 Server busy. Please try again later"
I got it working once by stop/starting KC and 5 minutes after it was back up, the queue started clearing after I tried resending a single email.

Any ideas, short downgrading to 9.3.1 again or stop/starting the mail server every hour?

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[Message index]

		KC 9.3.1 patch 1 - mail queue increasing for x.pro.protection.outlook.com destinations only By: Pete Mitchell on Tue, 09 November 2021 12:26
		Re: KC 9.3.1 patch 1 - mail queue increasing for x.pro.protection.outlook.com destinations only By: Bud Durland on Tue, 09 November 2021 17:13
		Re: KC 9.3.1 patch 1 - mail queue increasing for x.pro.protection.outlook.com destinations only By: Pete Mitchell on Tue, 09 November 2021 20:30

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