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email address being changed after send...How does this happen and how to fix it.

Question asked by dunnke on Jan 27, 2015
Latest reply on Jan 28, 2015 by dunnke

On my wife's computer running OS X Yosemite and Apple Mail, when she sends an email her address is being changed from to  This started to happen when she changed from pop to map for incoming mail. is an internal mail server in the shaw network.  That computer not the domain is set up anywhere in her computer.  I also believe that I have seen the address xxxxx@cds035, (but can't find the copy of the email with the headers).  The strange thing is the changed to email domain is always the last received from mail server.  The following headers show the change, this email left her computer with her correct address



Received: from (LHLO (

by with LMTP; Sun, 25 Jan 2015 12:54:46 -0700 (MST)

Received: from ( [])

  by (Postfix) with ESMTP id ADA6B7D804C

  for <>; Sun, 25 Jan 2015 12:54:46 -0700 (MST)

X-Cloudmark-SP-Filtered: true

X-Cloudmark-SP-Result: v=1.1 cv=YzkDeCCLkfvKKKvhMilE7Ce3LEB3kVshiYMlAyNVURc= c=1 sm=1

a=Scg_NR0Usi0A:10 a=BLceEmwcHowA:10 a=kj9zAlcOel0A:10

a=AxtXhqurj2nclCuvmOwhBA==:17 a=uCCo4La6iGOqyqK8QO8A:9 a=CjuIK1q_8ugA:10


Received: from unknown (HELO []) ([])

  by with ESMTP; 25 Jan 2015 12:54:46 -0700


Content-Type: text/plain; charset=us-ascii

Content-Transfer-Encoding: 7bit

Subject: Does this look any better?

Message-Id: <>

Date: Sun, 25 Jan 2015 11:54:46 -0800


Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\))

X-Mailer: Apple Mail (2.1993)



The people she emails can not reply or send to this changed address.  Last week I spent 3.5 hours on the chat service trying to get this fixed and there only response was switch to Thunderbird but that doesn't work for her.  Has anyone seen this before and how was it fixed?