Yes, I have had the same problem with Outlook deciding to remove EOL characters. There may be an easier or better solution (and I would be interested to know), but we ended up specifying HTML content. And that works (even though the Outlook HTML renderer is not exactly the best).

In reply to Re^3: Losing eol character using MIME::Lite by Laurent_R
in thread Losing eol character using MIME::Lite by cbeckley

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