HI J Lee, please see my thread : https://portal.smartertools.com/community/a94084/imminent-bug-with-notes-with-outlook-tested-it-with-2019-2016-configured-mapi-with.aspx

Hi,

Yesterday I upgrade our server from version 7761 to 7776 sucessfully but after a few hours the Smartermail service started to crash, it happened a few times, only the service restart did not work, the only way to put the service back online was to reboot the server but in some minutes the service failed again.

Finally downgrade back to version 7761 and till now everything is fine.

Upgrade my incoming gateway.  Downstream device must be identified by ip address in this build, so certificate verification must to be turned off - I think it is a new setting and on by default

A reboot was required for me as well with this version, 

Reboot did not worked for me, I had to downgrade.

We upgraded to 17_7776 on 4/22 by uninstalling the previous version (17_7753), followed by installing 17_7776.  No reboot was needed and everything worked.  However the server (Windows 2012 R2) was rebooted yesterday after running Windows Update to install 3 patches, and since then the IDS block list no longer shows the origin country for any IP, just "N/A". This includes 2 new blocks automatically added since the reboot. However in the SMTP logs, the country code in 2 digit format is still displayed correctly.

Update - This issue was fixed after upgrading to 17_7803.  Countries are now displayed again.

Upgraded last Wednesday the 28th and so far no issues.