On 10/16/20 2:10 PM, Viktor Dukhovni wrote: >> On Oct 16, 2020, at 3:14 PM, Demi M. Obenour <demioben...@gmail.com> wrote: >> >> I don’t recommend stock OpenSMTPD for security reasons, although I >> have some patches that make it much better in this regard. However, >> all of those relate to local deliveries. If you can afford to disable >> local deliveries, OpenSMTPD is actually a good choice for this work. >> It can handle multi-million-message queues without any problems. > > Well, for good performance one should not have much of a queue at all, > the mail should go out as quickly as it comes in. If you're queueing > a lot of email, then your output is not keeping up with the input.
Not necessarily. It is quite possible for the peak rate of incoming traffic to be greater than the average rate at which it can be delivered, even though the average rate of incoming mail is lower than the average delivery rate. That will result in queues forming and eventually draining. If the bursty traffic is distributed among multiple recipients with their own, separate rate limits, it is quite possible to have a queue of finite size at quasi-steady-state. > Unless there's a particularly good reason why you believe that OpenSMTPD > would do better than Postfix in bulk mail delivery performance, it is not > helpful to recommend it here. I misunderstood your previous message, sorry. I interpreted it as a statement that Postfix struggles with very large mail queues, and I know OpenSMTPD does not. Apologies, Demi M. Obenour
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