On 9/3/2012 12:02 AM, DTNX Postmaster wrote: > In other words, if 'we strip this back to hypothetical and assume a > perfect world without any issues', this 'GreenArrow' maxes out at > 300,000 messages per hour. Postfix can send 10,8 million messages per > hour, more than 35 times as fast*.
In all fairness, given your "perfect world" criteria, this ESP would be moving a lot more mail as well, with no restrictions on the outbound pipe or at the receiver. But as others have correctly pointed out, the issue here isn't MTA performance, it's administrative performance. The last thread I responded to demonstrates this. The big advantage ESPs have is their established relationships with the freemailers and other large mailbox providers. These allow them greater throughput than the unwashed bulk sender, at least into the receiver's initial queue. -- Stan