Berikut ini adlah daftar SMTP Response Error code.
| SMTP Response Number | Definition | How to Resolve / Examples |
|---|---|---|
| 101 | Cannot open connection | How to fix SMTP Error 101 |
| Examples: | “SMTP Error 101, Error opening connection” | |
| “SMTP Error 101, cannot open SMTP stream” | ||
| 111 | Connection refused or inability to open an SMTP stream | How to fix SMTP Error 111 |
| 211 | System status message or system help reply | How to fix SMTP Error 211 |
| 214 | Help message (Information on non-standard command) | How to fix SMTP Error 214 |
| 220 | <SERVER> Service ready | How to fix SMTP Error 220 |
| 221 | <SERVER> Service closing transmission channel | How to fix SMTP Error 221 |
| Examples: | “221 Closing connection” | |
| “221 Goodbye” | ||
| 250 | Requested mail action okay, completed | How to fix SMTP Error 250 |
| 251 | User not local; will forward to <REMOTEPATH> | How to fix SMTP Error 251 |
| 252 | Can not verify user; accepting message for attempt | How to fix SMTP Error 252 |
| 354 | Starting mail input | How to fix SMTP Error 354 |
| 420 | Timeout connection problem | How to fix SMTP Error 420 |
| NOTE: | This error is related to GroupWise Servers only. | |
| 421 | <SERVER> Service not available, closing transmission channel | How to fix SMTP Error 421 |
| 431 | Not enough storage or out of memory (See #452, #552) | How to fix SMTP Error 431 |
| 432 | Recipients Exchange Server incoming mail queue stopped | How to fix SMTP Error 432 |
| NOTE: | This error is related to Microsoft Exchange Servers only. | |
| 441 | Recipients mail server is not responding | How to fix SMTP Error 441 |
| 442 | Connection dropped during transmission | How to fix SMTP Error 442 |
| 446 | The maximum hop count was exceeded for the message: an internal loop has occurred. | How to fix SMTP Error 446 |
| 447 | Your outgoing message timed out because of issues concerning the incoming server. | How to fix SMTP Error 447 |
| 449 | A routing error. | How to fix SMTP Error 449 |
| NOTE: | This error is related to Microsoft Exchange Servers only. | |
| 450 | Requested mail action not taken: mailbox unavailable (e.g., mailbox not found, no access, or command rejected for policy reasons) | How to fix SMTP Error 450 |
| Examples: | “450 Please try again later” | |
| “SMTP Error 450 5.2.3 Msg Size greater than allowed by Remote Host” | ||
| 451 | Requested action aborted: error in processing | How to fix SMTP Error 451 |
| Examples: | “SMTP error 451 Unable to complete command, DNS not available or timed out” | |
| “451 Domain of sender address does not resolve” | ||
| 452 | Requested action not taken: insufficient system storage | How to fix SMTP Error 452 |
| Example: | “452 Out of memory” | |
| 455 | Server unable to accommodate parameters | How to fix SMTP Error 455 |
| 471 | An error of your mail server, often due to an issue of the local anti-spam filter | How to fix SMTP Error 471 |
| 500 | Syntax error, command unrecognized (This may include errors such as command line too long) | How to fix SMTP Error 500 |
| 501 | Syntax error in parameters or arguments | How to fix SMTP Error 501 |
| Example: | “Remote host said: 501 Invalid Address” | |
| 502 | Command not implemented | How to fix SMTP Error 502 |
| 503 | Bad sequence of commands | How to fix SMTP Error 503 |
| 504 | Command parameter not implemented | How to fix SMTP Error 504 |
| 510 | Invalid email address | How to fix SMTP Error 510 |
| 511 | Invalid email address (See #552) | How to fix SMTP Error 511 |
| 512 | A DNS error: the host server for the recipient’s domain name cannot be found. | How to fix SMTP Error 512 |
| Example: | “SMTP Error 550 5.1.2 Host unknown – host cannot be found” | |
| 513 | Address type is incorrect (possibly mispelled) | How to fix SMTP Error 513 |
| Examples: | “SMTP error 501 5.1.3 Invalid address” | |
| “SMTP error 553 5.1.3 User address required !” | ||
| “SMTP error 501 5.1.3 Bad recipient address syntax” | ||
| 521 | <DOMAIN> does not accept mail | How to fix SMTP Error 521 |
| Example: | “521 5.2.1 : (CON:B1) http://postmaster.info.aol.com/errors/554conb1.html” | |
| 523 | The total size of your mailing exceeds the recipient server’s limits | How to fix SMTP Error 523 |
| Examples: | “SMTP Error 450 5.2.3 Message Size greater than allowed by Remote Host” | |
| “SMTP Error 552 5.2.3 Data size exceeds maximum permitted” | ||
| “SMTP Error 552 5.2.3 Message exceeds maximum fixed size” | ||
| 530 | Normally, an authentication problem. But sometimes it’s about the recipient’s server blacklisting yours, or an invalid email address. | How to fix SMTP Error 530 |
| 541 | The recipient address rejected your message: normally, it’s an error caused by an anti-spam filter. | How to fix SMTP Error 541 |
| 550 | Requested action not taken: mailbox unavailable (e.g., mailbox not found, no access, or command rejected for policy reasons) | How to fix SMTP Error 550 |
| Examples: | “550 Invalid recipient” | |
| “550 User account is unavailable” | ||
| “550 No such user here” | ||
| 551 | User not local; please try <FORWARDPATH> | How to fix SMTP Error 551 |
| 552 | Requested mail action aborted: exceeded storage allocation | How to fix SMTP Error 552 |
| Example: | “552 sorry, mailbox user@somecompany.com is over quota temporarily (#5.1.1)” | |
| 553 | Requested action not taken: mailbox name not allowed (e.g., mailbox syntax incorrect) | How to fix SMTP Error 553 |
| 554 | Transaction failed (Or, in the case of a connection-opening response, “No SMTP service here”) | How to fix SMTP Error 554 |
| 555 | MAIL FROM/RCPT TO parameters not recognized or not implemented | How to fix SMTP Error 555 |
Sumber : https://wiki.knownhost.com/email/troubleshooting/error-numbers