I have just upgraded to Mountain lion and so I had to setup my account in iMail again. But, I guess I am doing something wrong. I have my school account on the iMail for which I had added the SMTP given on school website. I have also added another one for when I am at home and thus connected to the internet by Telus. however, now when I am anywhere other than the two (e,g, at coffee shop) I cannot send email. It says that I have to add or choose appropriate SMTP. I am saying I am doing something wrong because previously I never had this problem and I could send emai from anywhere without having even to choose the SMTP manually. I can still do the same on my iPhone but not my Mac. I greatly appreciate your help as this is really annoying.