Simon Waters pisze:
It refreshes cache at 3 hours by default, so within 3 days jon starts getting email (and spam potentially). This is configurable.

http://www.postfix.org/verify.8.html

Yeah, and it works on the other way round... if my customer's server will go down for more than 3h, my server will store his emails only for 3h. After that it will start reject them with 450.

Regards,
Jarek

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