The Russians relay spam through third countries rather than sending it directly.

俄罗斯通过另外的国家发送垃圾邮件而不是自己直接的发送。

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Server relay allows server to relay mails to a specific mail server instead of saving or sending mails directly.

依设定转寄到特定伺服器去，让下一个伺服器代做原本该寄信或存信的工作。

youdao

Server relay allows server to relay mails to a specific mail server instead of saving or sending mails directly.

依设定转寄到特定伺服器去，让下一个伺服器代做原本该寄信或存信的工作。

youdao