Please, use TLS session tickets. They eliminate the need for costly
per-connection TLS handshakes. This feature was introduced almost
three years ago with Postfix 2.11.
This won't help when you need to deliver mail to an ancient plaform,
but I'm afraid that complex workarounds for ancient platforms won't
be supported in the general Postfix release.
> So I suppose our questions are:
> Are there any plans to address this in the roadmap?
There are no such plans. TLS session tickets are supposed to solve
the general problem (i.e. without introducing changes such as
persistent connections in an SMTP client).
> Are there approaches to this problem that would be acceptable as a solution
> if we contributed it via a pull request?
If you think that the hard work will be adding a feature, then I
have bad news. The hard work will be adding code without breaking
other things. The SMTP client's connection management code is
non-trivial, yet it has proven to be very dependable over the years.
> Does you know of someone trusted by the community with good experience of
> the code we could maybe contract to do a change of this type as this may be
> better for everyone?
I know few, but we're all time-constrained.
Wietse
