We had an issue when we updated our Linux server this morning to the newest build. When testing emails from webmail and Outlook and mobile devices the spool was not showing data going through. Some emails got through and some didn't.
We first planned to restarted Smartermail services on the system to see if that would help, and it did, so we didn't need to reboot the server. Spool started to show data. Some of the emails we sent as tests started to go through and emails started to come in from our backup server we later noticed.
Something happened on the install. Re-starting the Smartermail services fix the issue.
One other strange thing we saw, one of the accounts we were testing has a forward setup. The email went directly to the forwarding email and did not show up in the email account or the spool.
That was our experience with this new build. All other updates were perfect.