Unable to send emails after update to 1.35.16

[Dr. Evil]

Have ZM installed on Ubuntu 20.04 and email was sending fine in previous version but after upgrading to 1.35.16, no email. Upgraded ssmtp to msmtp following https://bkjaya.wordpress.com/2019/10/21 ... ntu-19-04/ and am able to send mail successfully on the command line but email in ZM fails with following error:

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2020-12-15 11:52:48	zmdc		89373	ERR	'zmfilter.pl --filter_id=3 --daemon' exited abnormally, exit status 255	zmdc.pl
2020-12-15 11:52:48	zmfilter_3		89971	INF	Creating notification email	zmfilter.pl

The zm creates the email and then chokes on sending it. Any ideas on how to go about getting my email working again? I think it might be a problem with a perl dependency that got borked in the upgrade process but any ideas gratefully received.

[knight-of-ni]

The way to troubleshoot this is to test from the command line, as the web account user.

[Dr. Evil]

Well

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su - www-data -s /bin/bash -c echo "Hello, World" | mail -s "Hello, World from www-data" rick@xxx.ca

worked. Funny thing was in the earlier software version, mail was sent no problem. Any other clues I could follow?

[Dr. Evil]

Just did an update and it works! Go figure...