Rickard, I just went through this problem myself and the detection implemented in >=1.2 does NOT properly detect Exim, and so this error is still here. It is checking for WIN and MAC and not the MTA itself. Exim must have \r\n, not \n, and I had to manually add in that code to support it. Hopefully this will help out anyone like me who spent a bunch of time pulling their hair out.
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