退信

• 退信提示："Host abc.com(xxx.xxx.xxx.xx) RCPT TO said 421 Refused. You have no reverse DNS entry. Contact abuse@abc.com for details"
• 退信提示："Host abc.com(xxx.xxx.xx.xx) MAIL FROM said 451"
• 退信提示："MX query return retry"
• 退信提示："DNS query error"
• 退信提示："DNS can not resolve domain"
• 退信提示："Mail Size exceeds sever"
• 退信提示："message file too big"
• 退信提示："mail size or count over quota"
• 退信提示："message too large"
• 退信提示："message is too long"
• 退信提示："message size exceeds"
• 退信提示："larger than maximum message"
• 退信提示："size limit exceeded"
• 退信提示："tried to reach is over quota"
• 退信提示："exceeded mailsize limit"