On Wed, Sep 30, 2015 at 08:07:24AM -0400, Charles Marcus wrote:

> How do I tell postfix to pass these emails on to Office365, keeping all
> headrs intact, so the emails look as if they were originated/sent using
> the Office365 SMTP system? I'm thinking some kind of SMTP Auth
> pass-thru, but I'm not sure exactly what to google on, and I don't think
> this is a normal relay setup...

Why not just NAT the traffic to the Office365 submission service?

If queueing is simpler, Postfix needs to be compiled with Cyrus
SASL support:

    $ postconf -A
    cyrus

if so:

    http://www.postfix.org/SASL_README.html#client_sasl         (appropriate 
username + password)
    http://www.postfix.org/postconf.5.html#relayhost            (outlook365 
outbound service)
    http://www.postfix.org/postconf.5.html#mynetworks           (include 
originating client)
    http://www.postfix.org/postconf.5.html#mydestination        (empty)

-- 
        Viktor.

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