DNS query failed, 無論 mail server/filter 在不在你手上, 都不會有log. 你校的authoritative DNS s...
請問廠商的 PowerDNS Authoritative Server, master/slave(或稱primary/secondary), zone...
https://www.postfix.org/LOCAL_RECIPIENT_README.html Configuring local_recipie...
1)Dovecot quota, 參考文件較多 https://doc.dovecot.org/configuration_manual/quota/...
參考 https://superuser.com/questions/495759/why-is-ping-unable-to-resolve-a-name-w...
ayu的鐵人檔案