Attention Macintosh Users!

America/New York
The newest update of Mac OS Yosemite (10.10.4) is reported to have broken sending email.  Many Yosemite users are reporting that they can no longer send mail via simple mail transfer protocol (SMTP, locally or SMTP over SSL (  The latest update Apple published yesterday is said to have caused this problem.
We suggest you use the Zimbra web application or (non-Zimbra users only) until Apple publishes a work around.