[Exim] Sender verification... long-term temporary failures s…

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Autor: David Woodhouse
Data:  
A: exim-users
Assumptes nous: [Exim] Reject dest recipient
Assumpte: [Exim] Sender verification... long-term temporary failures should be considered permanent.
My dialup account gets lots of spam, much of it from domains for which
sender verification attempts _always_ result in a 'temporary' failure;
causing a 4xx rejection and my ISP to continue attempting to resend the
mail to me ad infinitum.

We already cache address verification results.... can we also cache
temporary failures, and consider them to be permanent failures after a
certain number of days?

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dwmw2