David Harris has implemented ESMTP AUTH CRAM-MD5 for WinPMail, Mercury and Mercury/32.  They do a SMTP authentication in accordance with RFCs 2554 and 2195.  Mercury and Mercury/32 also do the LOGIN and the strange MS AUTH=LOGIN.
 
Go to File | Network configuration | (Sending) SMTP, edit the SMTP setup, select the "Security" tab and select one of the 3 options for doing SMTP Authorization.
 
        <p>David Harris has implemented ESMTP AUTH CRAM-MD5 for WinPMail, Mercury and Mercury/32.  They do a SMTP authentication in accordance with RFCs 2554 and 2195.  Mercury and Mercury/32 also do the LOGIN and the strange MS AUTH=LOGIN.
</p><p>&nbsp;
Go to File | Network configuration | (Sending) SMTP, edit the SMTP setup, select the "Security" tab and select one of the 3 options for doing SMTP Authorization.
</p>