Thank you, this solved the SPF problem. I'm surprised that this is not more of a problem for machines with multiple IP addresses. I'm even more surprised that a setting this important to SPF is not readily available to be set up properly. I had to create the server.properties file.
Where is there a list of all the setting that can be made in the server.properties file? Perhaps there are more things hidden away that I should be changing but am not aware the setting exists...
Finally, that did correct the FIRST IP showing up in the email header, which is obviously the originating IP. The second IP in the header still does not show the correct IP, but I'm not sure if that is going to be a problem:
x-sender: danny@zzz.com
x-receiver: test-b763405a@appmaildev.com
Received: from mail.zzz.com ([5.5.5.1]) by appmaildev.com with Microsoft SMTPSVC(8.5.9600.16384);
Wed, 25 Jan 2017 22:16:48 +0000
X-BYPSHEADER: 1729145
X-SMScore: -496
Message-ID: <1078688873.6.1485382609038.JavaMail.SYSTEM@ZZZ-WebServer>
MIME-Version: 1.0
Content-Type: multipart/alternative;
boundary="----=_Part_5_713421782.1485382609038"
X-LCID: 2275216
Received: from [(5.5.5.2)] by ZZZ-WebServer with Xeams SMTP; Wed, 25 Jan 2017 22:16:48 +0000 (GMT)
X-SM_EnvelopeFrom: danny@zzz.com
X-SM_RECEIVED_ON: Wed, 25 Jan 2017 22:16:48 +0000 (GMT)
As you can see above, the second "Received" IP does not match the first. Again, I'm not sure this is going to be a problem, but thought I would pass the info along.
