> If the filter is after the > server providing the form page and the SUBMIT button, yes, the > server received the message. IETF can have a log file before the > filter (SOP), allowing review of what is filtered. Substantially similar capabilities are present in all of the SMTP MTA's I'm familiar with. If a message delivery attempt is rejected early, only envelope information is logged, but if the message was rejected in error, that's generally sufficient to identify what needs to be whitelisted. - Bill _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf