WSUS e-mail notifications not working

Question

Hi there,

I'm trying to set up e-mail notifications for our WSUS servers. The WSUS servers are running on Windows Server 2019 OS. The strange thing is that testing e-mail notifications works just fine, but the regular reports don't work. Instead I only get an error event (ID 10052 in WSUS server's application event log) that says that the server is unable to send e-mail notifications. In addition I can't find any hint that the server is trying to send an e-mail. Neither does SoftwareDistribution.log show any signs that an e-mail is being sent nor does the firewall show any try of a connection to the e-mail server.

What can I do to make the e-mail notifications work?

Thanks in advance.

Yours sincerely

Dominik Betz

Answer 1

@Dominik Betz
Thank you for posting in Microsoft Q&A forum.
Are you using a server name for the SMTP server.
Try to change that to an IPv4 address to see if it works.

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Answer 2

Hello,

Can you use telnet to check if the WSUS server and the SMTP server are open and able to relay?

https://learn.microsoft.com/en-us/exchange/mail-flow/test-smtp-with-telnet?view=exchserver-2019

Miguel Fra

www.falconitservices.com