With enabled greylisting, we lose emails - e.g. from yahoo
The explanation of greylisting from the UTM help-page:
> Greylisting basically means the temporary rejection of emails for a certain amount of time
> This data set causes the email to be rejected for a period of five minutes
The second try from yahoo is within this five minute window (2 - 3 min) - and yahoo tries only twice. So emails from yahoo are rejected.
Over time more and more ip-adresses from yahoo become valid and some emails were delivered.
Is it possible to configure the greylisting time-window?
Or is the only chance to whitelist all *yahoo* adresses?
(UTM Version 9.307-6)
thx
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