the sc_mail_send macro seems to be improperly formatting the MAIL FROM: and RCPT TO: during an SMTP session.
The proper way to format these commands per RFC 821 is
MAIL FROM:<address>
&
RCPT TO:<address>
sc_mail_send is adding a space after each colon.
MAIL FROM: <address>
RCPT TO: <address>
Most MTA’s will ignore this improper formatting and move on. However there are a few that will not.
This should be very easy to correct and I would be very grateful.