mac mail: Use SSL on SMTP Server turning on

I recently received and set up a new macbook pro (OSX 10.8.3) and I use it in both a wireless and wired network state.

I set up some POP accounts in my mac mail, and everything works great. But it seems that whenever I switch between networks, the "Use SSL" checkbox in my SMTP account for the mail magically turns on (I say "seems" because it could be some other factor such as actually changing to a completely different network location). At this point I can send out no new mails. I tracked this down fairly quickly, and annoying as it is, it *appears* at first glance to have a simple solution, go in and uncheck the box every time. However, the frustrating thing is, as soon as this occurs, I can't get the unchecked box to save. I'll go in, uncheck it, close it down, mail still won't send, and when I go back in I find it's still happily checked as "Use SSL".

The only way I've found to solve this problem so far is to delete the SMTP account, and then create a brand new one with the option unchecked. But having to do this every time I switch networks is ridiculous!

Does anyone have any thoughts as to what's going on or how I can *permanently* resolve this issue rather than resetting up my SMTP account over and over.