I have a account with multiple alias, with zimbra desktop, i can't send a mail with a from differents from the mail account email.
i have no problem with the zimbra webmail client, it's only in zimbra desktop.
my account email is : email@example.com
and my alias is : firstname.lastname@example.org
if in options->account :
From:Choose the name that appears in the "From" field of email messages
i choose email@example.com as sending address,
and when i create a new mail, my from is always "firstname.lastname@example.org" and not "email@example.com".
zimbra 5.0.14 - Zimbra desktop 1.0 build 1518