More to satisfy my own curiosity than anything else, I'm wondering about the performance that could be squeezed out of Postfix in a bulk mailing capacity.
I have a client that currently uses and ESP who have an astounding throughput of up to a million messages per hour. This brought up a discussion about high-performance MTAs and tuning and the general comments I'm hearing are that things like Postfix, Exim, Sendmail & are just not man enough for such a task and the absolute best you could expect from any of them is about 100k messages per hour. Now, I like to wipe out the fact from fiction because people like PowerMTA are looking to sell their products and it would be in their interest to neglect that any MTA (Postfix/Exim/Sendmail) could be set up in a way that would easily rival their product. Can anyone on the list tell me if it's possible to performance tune Postfix to a point where it could complete with this and possible strategies? Kind thanks
