> On Apr 11, 2017, at 1:55 PM, Philip Paeps <phi...@trouble.is> wrote:
>
> It is worth repeating that the spinning rust actually matters in this case:
> Postfix fsync()s when accepting a message into the queue. The time to it
> takes to enqueue a message is at least the time it takes to write it to
> disk, not simply the time it takes to hit the buffer cache.
For high-volume senders, the main problem is usually getting the mail *out*
faster with less friction from the receiving systems. Accepting mail faster
is not necessarily a good idea, if that just means a bigger backlog.
The OPs efforts should go towards understanding what it takes to send email
at the intended volume. Receiving it fast enough is a secondary issue.
It sounds like the OP is largely unprepared for the task at hand. This
requires real experience and dedicated effort. Just asking for a few ideas
on this list is unlikely to be sufficient.
A sane approach is to start small, grow gradually, and solve small problems
as they come up, before they become big problems. Going from nothing to
sending a very large volume of mail is not easy.
--
Viktor.
