Today my plan got disabled due to missing branch error (I've removed branch from git repository). I wanted to configure notifications to get mail in such situation but I see that there is no option for that.

Why this is important? If we aren't getting notifications from bamboo then we assume that test builds without problems, so we doesn't check plan status in bamboo - and then we can continue development for few days until someone will spot that our plan is disabled... and not knowing for few days that test fails is a big issue.