I have multiple emails in my Mac Mail and frequently use iCal to send me email reminders. However, it keeps trying to send me the reminders using an old email address that is no longer active (it's in my Mail but the account is offline), so I'm always getting outgoing server error notifications. So instead of iCal using the offline email address for outgoing, I want to switch it to to another email address.
How do I do that?
How do I do that?