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 mailing list
Ietf(_at_)ietf(_dot_)org
https://www1.ietf.org/mailman/listinfo/ietf