Hi Kyle! Thanks to your suggestion I found out what blocked the SAVE button...
There was no "red highlighted" options, but I tried to change every option one by one and finally found that Mailing List Max Message Size was the culprit...
I couldn't see it because it wasn't highlighted:
But after I tried to change te value it changed to highlight and told what's wrong:
I think that the min value has canged between versions, but there's a BUG that prevent to be highlighted so you can find it and correct it...
I have solved my issue (THANKS!), but definitely you need to correct this behavior.
Gabriele Maoret - Head of SysAdmins at SERSIS
Currently manages 6 SmarterMail installations (1 in the cloud for SERSIS which provides services to a few hundred third-party email domains + 5 on-premise for customers who prefer to have their mail server in-house)