Cisco Cisco Content Security Management Appliance M190 Guía Para Resolver Problemas
Commonly Seen SMTP Error Codes
4xx Codes:
421 #4.4.5 Too many TLS sessions at this time
421 #4.4.5 Too many connections from your host
421 #4.4.5 Too many connections to this host
421 #4.4.5 Too many connections to this listener
421 #4.x.2 Too many messages for this session
421 <hostname> Service not available, closing transaction channel
421 Exceeded allowable connection time
421 Exceeded bad SMTP command limit, disconnecting
421 The evaluation license has expired
451 #4.3.0 Server Error
452 #4.3.1 queue full
452 #4.3.1 server resources low − try again later
452 #4.3.1 temporary system error (12)
452 #4.5.3 Too many recipients
454 TLS not available due to a temporary reason
421 #4.4.5 Too many TLS sessions at this time
421 #4.4.5 Too many connections from your host
421 #4.4.5 Too many connections to this host
421 #4.4.5 Too many connections to this listener
421 #4.x.2 Too many messages for this session
421 <hostname> Service not available, closing transaction channel
421 Exceeded allowable connection time
421 Exceeded bad SMTP command limit, disconnecting
421 The evaluation license has expired
451 #4.3.0 Server Error
452 #4.3.1 queue full
452 #4.3.1 server resources low − try again later
452 #4.3.1 temporary system error (12)
452 #4.5.3 Too many recipients
454 TLS not available due to a temporary reason
5xx Codes:
500 #5.5.1 command not recognized
500 Line too long
501 #5.0.0 EHLO requires domain address
501 #5.5.2 syntax error XXX
501 #5.5.4 Invalid arguments to AUTH command
501 Unknown command XXX
501 Unknown option XXX
501 Unknown value XXX
503 #5.3.3 AUTH not available
503 #5.5.0 AUTH not permitted during a mail transaction
503 #5.5.0 Already authenticated
503 #5.5.1 MAIL first
503 #5.5.1 RCPT first
503 Bad sequence of commandsDATA within mailmerge transaction
503 Bad sequence of commandsXPRT within plain transaction
503 Bad sequence of commandsnow receiving parts
503 Not in a mailmerge transaction
504 #5.5.1 AUTH mechanism XXX is not available
504 Command parameter XXX unrecognized
504 Invalid XDFN syntax
504 Invalid part number
504 Invalid part number XXX
504 No variable value specified
504 Other parts still missing
504 Reserved variable name
504 Syntax error in *parts syntax
504 XDFN command must not contain NULL characters
530 #5.7.0 Must issue a STARTTLS command first
530 #5.7.0 This sender must issue a STARTTLS command first
530 Authentication required
538 #5.7.11 Encryption required
552 #5.3.4 message header size exceeds limit
552 #5.3.4 message size exceeds limit
500 #5.5.1 command not recognized
500 Line too long
501 #5.0.0 EHLO requires domain address
501 #5.5.2 syntax error XXX
501 #5.5.4 Invalid arguments to AUTH command
501 Unknown command XXX
501 Unknown option XXX
501 Unknown value XXX
503 #5.3.3 AUTH not available
503 #5.5.0 AUTH not permitted during a mail transaction
503 #5.5.0 Already authenticated
503 #5.5.1 MAIL first
503 #5.5.1 RCPT first
503 Bad sequence of commandsDATA within mailmerge transaction
503 Bad sequence of commandsXPRT within plain transaction
503 Bad sequence of commandsnow receiving parts
503 Not in a mailmerge transaction
504 #5.5.1 AUTH mechanism XXX is not available
504 Command parameter XXX unrecognized
504 Invalid XDFN syntax
504 Invalid part number
504 Invalid part number XXX
504 No variable value specified
504 Other parts still missing
504 Reserved variable name
504 Syntax error in *parts syntax
504 XDFN command must not contain NULL characters
530 #5.7.0 Must issue a STARTTLS command first
530 #5.7.0 This sender must issue a STARTTLS command first
530 Authentication required
538 #5.7.11 Encryption required
552 #5.3.4 message header size exceeds limit
552 #5.3.4 message size exceeds limit