SMTD-790 — Non US-ASCII mail not correctly declared
The proxy received a MAIL command without BODY=8BITMIME declaration, but the mail contained 8bit data (either non US-ASCII characters found or the "Content-Transfer-Encoding: 8bit" header present).
Mail is rejected (E-level) or corrected (W-level) depending on the MAIL-FILTER.UNFLAGGED-8BIT configuration directive.