But the problem is...the SMTP server list I can edit, is NOT the same as the much longer one in the "pick an outgoing server" list. However, I'll try removing the previous recipients (it's handy, but not a deal breaker) to see if it changes what shows up there.
I will have a look at the Keychain too - might be something there. Was the issue you had the wrong email showing up in the "from" field, Mose, or the SMTP list having non-functioning options? The two issues are on two different computers, which I didn't really make clear.
As for the last email viewed - nope. It picks email addresses I rarely use. The bad thing is occasionally it picks one that's working fine and I don't notice it - and so I end up with replies from whoever I emailed to that email addy's inbox and not where I would like it to be, scattering conversations all over the place. And then people sometimes use that email addy for a new email to me...
I have different email addresses for different purposes...it seems my Mac is determined to screw that up. :p