How about just removing the Outgoing Mail Server from that account?
I have 2 Email accounts set up through outlook. Occationally, the primary account does not work for reasons not important to this post. (sometimes it is server issues... sometimes it is local issues)
However, instead of outlook simply giving me an error that says the account isn't working and outlook cannot send the message, it automatically defaults to the 2nd account and sends through that one. However, I do not want this to happen. How can I stop this?? Thanks in advance!!