Hey everyone. I just wanted to report a two problems that I came across a few weeks ago while upgrading a SM 16x server to SM 17x just in case any of you come across the same thing.

1.) Forwarding Exclusions not carried over from 16x to 17x. Instead of carrying over the settings from 16x to 17x, the upgrade somehow reset all of the domains to No Exclusions - Forward All Mail. I'm sure all of you know why this would be a problem if it went undiscovered. Your customer's mail, spam and all, would be forwarded to their external forwarding accounts and that could possibly cause your server to be blacklisted or deferred/rate limited by larger ESPs. 

2.)  Could not load file or assembly. You can find the resolution here: https://portal.smartertools.com/kb/a3449/could-not-load-file-or-assembly-when-installing-or-upgrading-smartermail.aspx