Using MacOS Sierra v 10.12.4 and this is in sending an email. I have the system displaying the email prior to sending
Hmm. I'm not sure what I can do to make Outlook recognize the same newline that Apple Mail does.
You'll just have to manually edit the email to suit your taste before sending if you must use Outlook.
-Kirk
This is a quote from RFC2822 (Internet Message Format):
Messages are divided into lines of characters. A line is a series of
characters that is delimited with the two characters carriage-return
and line-feed; that is, the carriage return (CR) character (ASCII
value 13) followed immediately by the line feed (LF) character (ASCII
value 10). (The carriage-return/line-feed pair is usually written in
this document as "CRLF".)
Could it be that {nl} evaluates to CR (only) on a Mac and that Apple Mail honors it while different MUAs (possibly on Windows) stick to the RFC?