On 05/10/15 14:03, David Woodhouse wrote:
> Recently I've noticed a few times that I've been unable to send mail
> (from my MUA) because the mail server has too many concurrent SMTP conn
> ections.
>
> This doesn't work, because it's not expanded:
>
> smtp_accept_max = ${if eq{$interface_port}{587} {25}{20}}
>
> Could it be?
Small coding change; minor decrement to performance.
> Any alternative suggestions?
- Just increase the numbers. Anything more beefy than a PI
can easily handle more.
- Offload peaks by queueing. See queue_only_load and
smtp_accept_queue.
- Limit per-host connections: smtp_accept_max_per_host
- Reserve conns for known IPs: smtp_accept_reserve.
- Don't teergrube so aggressively.
- Don't use an Apple MUA. They aggressively open multiple
connections merely to monitor the MSA presence.
--
Cheers,
Jeremy
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