On Tue, Aug 04, 2020 at 02:37:22PM -0300, SysAdmin EM wrote:
> > No, the message never went back into the queue, since it was delivered
> > on the first attempt. The second MX host tried did not enforce
> > greylisting.
>
> Any recommendation to avoid retrying the second mx? in some cases when
> retrying the second mx we also represent the grey list error.
Trying a second MX is the right thing to do.
- Pattern matching the greylisting response is too fragile.
- The various MX hosts may not share their greylisting caches,
and you may encounter another greylising delay if you defer
and retry.
- Probably some other reasons, that I'm too lazy to recall on
the spur of the moment.
Just let Postfix do its job.
--
Viktor.
