Log Messages
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421
<domain> service not available, closing transmission channel
432
A password transition is needed
450
Requested mail action not taken: mailbox unavailable
451
Requested action aborted: error in processing
452
Requested action not taken: insufficient system storage
453
No mail
454
TLS not available due to temporary reason. Encryption required for requested
authentication mechanism
455
Server unable to accommodate parameters
458
Unable to queue message for node
459
Node not allowed: <reason>
500
Syntax error, command unrecognized
501
Syntax error in parameters or arguments
502
Command not implemented
503
Bad sequence of commands
504
Command parameter not implemented
510
Check the recipient address
512
<domain> cannot be found. Unknown host
515
Destination mailbox address invalid
517
Problem with senders mail attribute, check properties
521
<domain> does not accept mail (see RFC1846)
522
Recipient has exceeded mailbox limit
523
Server limit exceeded. Message too large
530
Encryption required for authentication mechanism
531
Mail system full
533
Remote server has insufficient disk space to hold email
534
Authentication mechanism is too weak. Message too big
535
Authentication unsuccessful/Bad username or password
538
Encryption required for authentication mechanism
550
Requested action not taken: mailbox unavailable
551
User not local, please try <forward-path>
552
Requested mail action aborted: exceeded storage allocation
553
Requested action not taken: mailbox name not allowed
554
Transaction failed
555
MAIL FROM/RCPT TO parameters not recognised or not implemented
TCP/IP error messages
The following table shows the TCP/IP error messages:
1001
General Error
1002
Invalid socket descriptor
1003
Invalid parameter
1004
It would have blocked
1005
Not enough memory in memory pool