It appears that Bill Cole via mailop <mailop-20160...@billmail.scconsult.com> said: >If only we had a framework for error codes in SMTP that carry useful >semantics...
We do. That's what the enhanced error codes are for. See RFCs 1893 and 5248. A lot of them are quite informative, e.g. 5.2.2 mailbox full, 5.7.13 user account disabled, 5.5.3 too many recipients, or 5.7.28 mail flood detected. Recipient systems don't have a whole lot of incentive to provide those codes because they correctly believe that most senders will ignore them, and some senders will use them to try to game their filters. R's, John _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
