The following reason was given:User unknown Mail Sieve Subsystem

The following reason was given:User unknown Mail Sieve Subsystem The following message to was undeliverable.The reason for the problem:5.1.0 The following message to was undeliverable. The reason for the problem: 5.1.这句话翻译成汉语怎么说? 求翻译Which of the following is NOT the reason for most British to live in homes? the following 英语翻译The following message to was undeliverable.The reason for the problem:5.4.7 - Delivery expired (message too old) [Default] 451-'4.3.0 Error:internal error 1' 英语翻译The following message to was undeliverable.The reason for the problem:5.1.0 - Unknown address error 550-'sorry,no mailbox here by that name (#5.1.1)' the reason that和the reason why the reason why与 the reason the very reason是什么意思the very reason The following message to was undeliverable.The following message to was undeliverable.The reason for the problem:5.1.0 - Unknown address error 550-'sorry,mail to that recipient is not accepted (#5.7.1)'这是完整的 英语翻译The reason why to support this view can be listed as the following.这句英语有没有无法错误呢? 问一个英语语法问题.我是英语菜鸟Now let me enumerate the reasons one by one in the following.为什么这里的reason 要加s呢? 谁知道the reason what is the reason with the same reason the following day为什么用following the following topics