On Sat, 15 Apr 2023, Sebastian Arcus via Exim-users wrote:
I don't know what sort of latency there will be between these machines,
but you might be able to use cutthrough delivery from the front-end to the
real server, which might allow you to reject rather than bounce some of the
time; it might even help with your SPF dilemma ?
That was my intention - so that the back-end machines can verify if the
recipient exists. Are you saying that when using cutthrough delivery, this
doesn't add an extra header to the email message - so this way it wouldn't
mess up the SPF checks on the back-end machine? (I was assuming that the
front-end machine would add another header to the incoming email, which would
make it appear to be one of the sending servers - which I then assumed would
fail the SPF checks on the back-end machines)
I have never actually used cut-through and I don't know.
--
Andrew C. Aitchison Kendal, UK
and...@aitchison.me.uk
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