Campus has announced that starting on January 5, 2016, individual users will no longer be able to send email through the CalMail SMTP server (using calmail.berkeley.edu as outgoing SMTP server). See https://bconnected.berkeley.edu/news/important-information-bmail-users-using-calmail-send-mail

Affected users have been identified and contacted directly via email by the bConnected Service Team.

Use of the bMail web interface is not affected. Alternate mail clients such as Outlook, Thunderbird, and Apple Mail, should use smtp.gmail.com as outgoing SMTP server, with a bConnected Key.

IRIS continues to maintain gateway.eecs.berkeley.edu as an alternate outgoing SMTP server. Some pointers for specific configuration of Outlook, Thunderbird, and Apple Mail can be found in our FAQ pages.