The article was incomplete. However, it would seem to indicate that I don't need to chase Postfix but Dolphin on this. In the article it talked about removing the \r from the Dolphin code. However, I decided to go searching on the net to see what I could find. What I found was that most were saying that the code should be something along the lines of:
$headers = 'MIME-Version: 1.0' . "\r\n";
The article you pointed to was old, 2011 and I need to go see what is in the current code; but it was illustrating that Dolphin is:
$sMailHeader = "MIME-Version: 1.0\r\n" . $sMailHeader;
So following what I found we want:
$sMailHeader = "MIME-Version: 1.0" . "\r\n" . $sMailHeader;
From what I read, it is a question of getting php to properly parse things. I might try this and see what happens. Someone else on here was having problems with attachments to emails. However, things were working properly on the old server but I am not sure when I upgraded to 7.1.1 so maybe what I am recalling working was 7.1.0 and the upgrade is part of my issue.
edit: I also upgraded php when I went to the new server, it was only a minor point release; from php 5.4.24 to php 5.4.27.