退信

• 退信提示："SMTP error, RCPT TO：550 Use mail relays of your ISP.."
• 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, RCPT TO：550 Host xxx.xxx.xx.xx has been banned from this server"
• 退信提示："550 5.7.1 xxx.xxx.xxx.xxx has been blocked by SBL+"
• 退信提示："501 5.7.1 Sender refused by the DNSBL zen.spamhaus.org."
• 退信提示："Host abc.com(xxx.xxx.xxx.xxx) MAIL FROM said 453 Blocked by NSBL"
• 退信提示："User not allowed from this sender by policy"
• 退信提示："User not allowed by policy"
• 退信提示："Requested action not taken: SSL service not available to this user"
• 退信提示："Requested action not taken: XXX, mail is rejected by CAC XXX", Str"
• 退信提示："Requested action not taken: XXX, mail reject by CAC XXX", Strategy Ctx.m_lpszTransID, strDelistInfo.c_str()"
• 退信提示："Requested mail action aborted: exceeded max subject hit limit"
• 退信提示："Send mail rejected by CAC"
• 退信提示："Sender hangup"
• 退信提示："license reject"