>> Questions about address verification: >> >> I don't quite understand the difference between >> address_verify_negative_expire_time and >> address_verify_negative_refresh_time. If an address needs to be >> refreshed anyway, does it make any difference whether or not it was >> "expired"? What use is the expire time? > > When an entry age is greater than refresh but less than expired, > postfix will immediately respond with the cached answer, and then in > the background attempt to verify the address. This way the client > doesn't have to wait for the verification refresh to actually take > place.
Thank you kindly for your easy to understand explanations.
