>It is MUCH faster than trying to feed the message to Postfix >(aka Sendmail) via SMTP/587 because in the case of just piping the >message, Postfix doesn't make me wait until it has done the >DNS lookups it thinks it needs to do in order to process >the message.
I think something is wrong with your setup. I submit over the global Internet, with extra round trips for authentication and encryption, and I see submission times in less than a second (you can see more details here): https://lists.gnu.org/archive/html/nmh-workers/2015-07/msg00019.html --Ken -- nmh-workers https://lists.nongnu.org/mailman/listinfo/nmh-workers
