[MlMt] Running one mail account completely separate from others

[Jan Erik Moström]

I have a number of email accounts but I would like to run one account 
completely separate from other account, like "this is the only account 
currently visible for MailMate". This to avoid some mistakes that could 
have some undesirable consequences. I don't mind quitting MailMate 
switching from one configuration (with all email accounts except one) to 
another (with only one account), in fact this would be perfect for me.

I assume this isn't possible in an easy way, but in case I'm wrong I 
would like to know how to do it. My current solution is simply to use 
Mail for that account ... but if I could use MailMate for all of them, 
great.

= jem