One of our customers, who is a reviewer with a magazine, has the
following email-account with this magazine:

            [EMAIL PROTECTED],

 

however she uses her company-address as from-address:
[EMAIL PROTECTED]

 

Now she sends me an email from the account she has with the magazine:

            From: [EMAIL PROTECTED]

            To:     [EMAIL PROTECTED]

 

This mail arrives in my mailbox with:

            From: [EMAIL PROTECTED] on behalf of
[EMAIL PROTECTED]

 

The mail-headers contain:

            From: [EMAIL PROTECTED]

            Sender: [EMAIL PROTECTED]

            Return-Path: [EMAIL PROTECTED]

 

But, in the Postfix logfile I see:

            [EMAIL PROTECTED]

 

This gives problems with SPF: mail from "@mycomp.nl" which does not come
from an email-server of "mycomp.nl", so it will be blocked.

 

Doing something analogous from gmail, works allright: in that case the
from-address in the Postfix-logfile is the gmail-address, not the
mycompany-address (also the

Return-Path header has the gmail-address).

 

So, what determines the from-address Postfix will use?

 

regards,

Kees.

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