SMTP/TCP
A list of request and response codes for SMTP/TCP used in ATA and alarms. Each list is searchable and sortable.
 
Requests
Request ID
Explanation
8BITMIME
8BITMIME
ATRN
ATRN
AUTH
AUTH
BDAT
BDAT
BINARYMIME
BINARYMIME
BURL
BURL
CHECKPOINT
CHECKPOINT
CHUNKING
CHUNKING
DATA
DATA
DELIVERBY
DELIVERBY
DSN
DSN
EHLO
EHLO
ENHANCEDSTATUSCODES
ENHANCEDSTATUSCODES
ETRN
ETRN
EXPN
EXPN
FUTURERELEASE
FUTURERELEASE
HELO
HELO
HELP
HELP
MAIL
MAIL
MTRK
MTRK
NO-SOLICITING
NO-SOLICITING
NOOP
NOOP
ONEX
ONEX
PIPELINING
PIPELINING
QUIT
QUIT
RCPT
RCPT
RSET
RSET
SAML
SAML
SEND
SEND
SIZE
SIZE
SOML
SOML
STARTTLS
STARTTLS
SUBMITTER
SUBMITTER
TURN
TURN
UTF8SMTP
UTF8SMTP
VERB
VERB
VRFY
VRFY
Responses
Response ID
Explanation
211
System Status
214
Help Message
220
Domain Service Ready
221
Domain Service Closing
235
Authentication Succeeded
250
OK, Node Queueing Started/Mail Action Completed
251
OK, No Node Messages/User Not Local, Forward to ForwardPath
252
OK, Pending Node Messages/Unknown User, Will Attempt Delivery
253
OK, Messages Pending/Node Messages Started
334
Server challenge/Ready response
354
Start Mail Input
355
Octet-Offset is Transaction Offset
421
Domain Service Not Available, Closing Transmission Channel
432
Password Transition Needed
450
Mailbox Unavailable/ATRN Request Refused
451
Requested Action Aborted/Unable to Process ATRN Request
452
Insufficient System Storage
453
You Have No Mail
454
TLS Not Available/Encryption Required for Requested Auth Method
458
Unable to Queue Node Messages
459
Node Not Allowed
500
Command Not Recognized/Syntax Error
501
Syntax Error: No Parameters Allowed
502
Command Not Implemented
503
Bad Sequence of Commands
504
Command Parameter not Implemented
521
Machine Does Not Accept Mail
530
Must Issue STARTTLS Command First/Encryption Required for Requested Auth Method
534
Authentication Method too Weak
535
Authentication credentials invalid
538
Encryption Required for Requested Auth. Method
550
Requested Action Not Taken: Mailbox Unavailable
551
User Not Local: Try ForwardPath
552
Requested Mail Action Aborted: Exceeded Storage Allocation
553
Requested Action Not Taken: Mailbox Name Not Allowed
554
Transaction Failed