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From: Victor Duchovni (Victor.Duchovnimorganstanley.com)
Date: Tue Apr 20 2010 - 17:58:18 CDT
On Tue, Apr 20, 2010 at 05:34:26PM -0500, Noel Jones wrote:
> Something like:
> # main.cf
> smtpd_sender_restrictions =
> check_sender_access hash:/etc/postfix/sender_only
> # sender_only
> example.com OK
> Warning: use this in smtpd_sender_restrictions as shown above. DO NOT use
> this in smtpd_recipient_restrictions as it would make you an open relay.
This also blocks bounces, which should not be blocked. One must also
white-list the empty sender:
The ".example.com" form may be need depending on the value of "p_d_m_s"
P.S. Morgan Stanley is looking for a New York City based, Senior Unix
system/email administrator to architect and sustain our perimeter email
environment. If you are interested, please drop me a note.