退信

• 退信提示："SMTP error, RCPT TO: 550 Mail from XXXX refused"
• 退信提示："554 Service unavailable"
• 退信提示："in my badmailfrom list"
• 退信提示："blacklist"
• 退信提示："IP in blacklist"
• 退信提示："IP in blacklist"
• 退信提示："IP is rejected"
• 退信提示："ip blocked from this server"
• 退信提示："User reject"
• 退信提示："RCPT REJECT"
• 退信提示："address blocked"
• 退信提示：""
• 退信提示："rcpt handle timeout"
• 退信提示："local error in processing"
• 退信提示："Server configuration problem"