David Nicol wrote: > You have to treat the whole address as the key to the preference > looker-upper, as SMTP allows recipients with multiple domains in the > same transaction. The latest release of tipjar::MTA (outbound) for > example organizes multiple recipients after an MX lookup instead of by > domain. DJB said it was silly to do such a thing in the qmail release > notes, explaining why qmail-send resends messages instead of grouping.
I appreciate that SMTP allows it, but, there doesn't appear to be any servers actually doing it. I've not seen any evidence of it out of millions of emails per day. [Part of our trap MXes for a _lot_ of domains, so I think I'd have noticed by now.] Incidentally, thanks for your suggestion to look at tipjar, but it wouldn't have fullfilled the needs at all. Besides, one more google search showed me I had been dumb all along, and it's trivial to get error diagnostics back from Net::SMTP (the only reason I was thinking to abandon it).
