SMTP Commands Part # 3 - List of Server reply codes


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SMTP Commands Part # 3 - List of Server reply codes

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When we execute the SMTP command, we'll receive a reply from the mail server in the form of a three digit number followed by information describing the reply.

For example,

250 OK

Please find the list of reply codes from the Server.

211

 A system status or help reply.

214

 Help Message.

220

 The server is ready.

221

 The server is ending the conversation.

250

 The requested action was completed.

251

 The specified user is not local, but the server will forward the mail message.

354

 This is a reply to the DATA command. After getting this, start sending the body of the mail message, ending with "\r\n.\r\n."

421

 The mail server will be shut down. Save the mail message and try again later.

450

 The mailbox that you are trying to reach is busy. Wait a little while and try again.

451

 The requested action was not done. Some error occurs in the mail server.

452

 The requested action was not done. The mail server ran out of system storage.

500

 The last command contained a syntax error or the command line was too long.

501

 The parameters or arguments in the last command contained a syntax error.

502

 The mail server has not implemented the last command.

503

 The last command was sent out of sequence. For example, you might have sent DATA before sending RECV.

504

 One of the parameters of the last command has not been implemented by the server.

550

 The mailbox that you are trying to reach can't be found or you don't have access rights.

551

 The specified user is not local; part of the text of the message will contain a forwarding address.

552

 The mailbox that you are trying to reach has run out of space. Store the message and try again tomorrow or in a few days-after the user gets a chance to delete some messages.

553

 The mail address that you specified was not syntactically correct.

554

 The mail transaction has failed for unknown causes.

  • When we execute the SMTP command, we'll receive a reply from the mail server in the form of a three

  • Could anyone please advise how to overcome the problem of SYNTAX ERROR 501.

    Thanks

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