Connected to but sender was rejected.是什么原因Connected to but sender was rejected.是什么原因郵件被退回，退件顯示Connected to but sender was rejected.遠程主機回應：550 mail not accepted from blacklisted IP address是什么原因，如何解決

熱心網友

這個信息說明你被對方主機列為黑名單了，你發的信都會被直接拒收