421 HL: REP the IP transmission abnormal behavior, the presence of absence of a large number of the recipient, the connection is temporarily prohibited. Please check for users to send viruses or spam and send a list to check the validity;
• 421 HL: ICC The IP concurrent connections is too large, exceeding the limit of Netease, it is temporarily prohibited connection. Please check for users to send viruses or spam, and reduce the number of IP concurrent connections;
• 421 HL: IFC The IP sends a large number of letters in the short term, exceeding the limit of Netease, is temporarily prohibited connection. Please check for users to send viruses or spam, and lower the transmission frequency;
• 421 HL: MEP of the IP to send abnormal behavior, there is a large number of domain names in counterfeit send behavior, the connection is temporarily prohibited. Please check for users to send viruses or spam, and send real and effective use of the domain name;
• 450 MI: CEL sender of an excessive number of errors instruction. Check the transmission procedure;
• 450 MI: the DMC messages currently connected to the transmission exceeds the limit number. Reduce the number of messages delivered per connection;
• 450 MI: CCL sender sends the number of instructions beyond the normal. Check the letter program;
• 450 RP: DRC current number of recipients connection to send exceeds the limit. Please control the number of messages delivered per connection;
• 450 the RP: CCL sender sends the number of instructions beyond the normal. Check the letter program;
•450 DT: RBL transmission in one or more IP in RBL. Please refer to http://www.rbls.org/ relevant information about the RBL;
• 450 WM: BLI that IP is not allowed to send Netease address list;
• 450 WM: BLU letter Netease list of users this user is not allowed in ;
• 451 DT: SPM, the try Again Please mail body with a feature or send spam lack of normative environment, is temporarily rejected. Keep the mail queue, two minutes after the re-vote messages. Message content should be adjusted or optimized transmission environment;
• 451 Requested mail Action not taken: TOO much Fail authentication login failures too, was temporarily banned from. Please check the password and account verification settings;
• 451 RP: CEL sender of an excessive number of errors instruction. Check the letter program;
• 451 MI: DMC number of messages sent over the connection beyond the current limit. Please control the number of messages per connection in delivery;
• 451 MI: SFQ number of letters the sender within 15 minutes exceeds the limit, please control the transmission frequency;
• 451 RP: QRC cumulative recipient of the sender in the short term the number exceeds the limit, the sender is temporarily prohibited letter. Please reduce the user transmitter frequency;
•451 Requested action aborted: local error in processing system temporarily fails, please try later sent again;
• 500 Error: Bad syntaxU the SMTP command syntax sent in error;
• 550 MI: NHD the HELO command is not allowed to be empty;
• 550 MI : IMF sender e-mail address irregularities. Please refer to the definition of e-mail http://www.rfc-editor.org/ norms;
• 550 MI: SPF letter was not sent SPF IP licensing domain. Please refer to http://www.openspf.org/ definition of SPF specification;
• 550 MI: DMA The message has not been licensed DMARC letter domain. Refer to the definition of http://dmarc.org/ DMARC specification;
• 550 MI: the STC number of connections exceeds the number of the sender defining the day, the day no longer acceptable senders. Please control the number of connections;
• 550 RP: FRL NetEase mailbox does not open anonymous forwarding (Open Relay);
• 550 RP: RCL number of burst recipients exceeded the limit, reduce the number of recipients per message;
• 550 RP: TRCThe sender within the same day cumulative number of recipients exceeds the limit, the same day no longer accept the sender's message. Please reduce the user transmitter frequency;
• 550 DT: SPM message body with a lot of junk mail feature or send an environment lacking the normative. Message content should be adjusted or optimized transmission environment;
• 550 the User Invalid user requested does not exist;
• 550 in the User blacklist the user is not allowed to the letter Netease users;
• 550 the User Suspended requested by the user is disabled or frozen;
• 550 Requested mail action not taken: too recipient much quantity exceeds the mass limit;
• 552 Illegal attachment not allowed to send this type of attachment, including .uu .pif .scr .mim .hqx .bhx .cmd .vbs .bat .com. end attachments vbe .vb .js .wsh the like;
• Action aborted 552 Requested mail: mailsize limit exceeded Number of letters transmitted exceeds the maximum size limit YORK mail can be received;
• 553 Not Requested Action taken: Not allowed iS NULL SENDERDo not allow the sender is empty, please send use the real sender;
• 553 Requested Action not taken: the User Local only the SMTP type of machine is only allowed senders site users;
• 553 Requested Action not taken: NO only the SMTP MX MX type of machine is not allowed senders site users;
• 553 iS authentication required the SMTP requires authentication, check client settings;
• **** 554 ** DT: SPM mail data contains information not permitted , or the system identified as spam. Please check for users to send viruses or spam; **
• 554 DT: SUM envelope sender and header sender does not match;
• 554 IP IS Rejected, the SMTP auth error limit Exceed the IP number of authentication failures too, is temporary Do not connect. Please check the verification information set;
• 554 HL: IHU connection behavior sender IP due to spamming or there is an abnormality, is temporarily suspended. Please detection and signaling IP signaling case letters in the history of the program if there is abnormal;
• 554 HL: IPB sends the IP address list is not allowed NetEase's;
• 554 MI: the STCWithin the same day cumulative number of the message sender exceeds the limit, the same day no longer accept the sender's Investment Trust. Please reduce the transmission frequency;
• 554 MI: SPB letter Netease list of users this user is not allowed in;
• 554 IP in blacklist that IP is not allowed to send Netease address list.
