Yahoo 的Email 退信:SMTP<< 421 Message from (69.50.193.17) temporarily deferred - 4.16.50. Please refer to
如果你發現你的mail主機發的信件，Yahoo收不到，這是YAHOO發信過濾政策改變；mail server廠商將信件過濾機制不固定期間政策不固定異動這是常態，還請務必要先理解！ 但你會發現，有時候改 […]
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