Other alarms work, but email alarms are not being sent. They don't even show in the sent folder in Mail.app. My email address in my address book is correct, and Mail.app sends and receives normal mail.
same for me. no alarms, emails or anything - not in icalendar or when using 'to do' in mail. i did a test with every alarm avaialble in both icalendar and mail - nothing.