It looks as though the Exchange server requires NTLM authenticaion, it doesn't look as though Mail::SendEasy supports this, and it has not been updated in years. Consider using something like Mail::Sender which does support NTLM.

Update: fixed typo s/NTLM/NTLM/. Thanks MidLifeXis

In reply to Re: Problem with Mail::SendEasy and Exchange server by marto
in thread Problem with Mail::SendEasy and Exchange server by dracos

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