扫码联系芯火客户经理
如何快速处理退信问题?
退信提示:“delivery temporarily suspended:connect to mail.abc.com[xxx.xxx.xx.xx]:Connection timed out”
退信提示:“MAIL FROM: 550 5.0.0 Mail rejected due to possible SPAM。”
退信提示:“550 5.7.1 Recipient not authorized, your IP has been found on a block list”
退信提示:“SMTP error, MAIL FROM:553 sorry, your envelope sender domain must exist”
退信提示:“RCPT TO:550 Disabled.”
退信问题处理方式
发送邮件未成功投递,收到退信怎么办?