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
andrew@???
