I have added an external account with "From" field configured as the external email address.
When I send an email (selecting this account instead of primary account), the primary account is still used
Example (primary account is email@example.com, used internally only)
Apr 19 15:23:07 rhel5dev-zimbra postfix/qmgr: 7EAEDCEB88: from=<firstname.lastname@example.org>, size=699, nrcpt=1 (queue active)
Apr 19 15:23:08 rhel5dev-zimbra postfix/smtp: 7EAEDCEB88: to=<###@####>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.61, delays=0.04/0.01/0.01/0.55, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=15159-09, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 0D9AFCEB89)
What can I do to make it use the external address for sending emails, not only appear to use in a mail reader ?