| Error Code |
Description of Error or Mail Block |
| 421 |
Your IP is temporarily blocked, you may try again later. |
| 521 |
The IP is Blacklisted by [MAPSResponse] Disconnecting... |
| 522 |
A URL in the email is Blacklisted by SURBL: [MAPSResponse] Disconnecting... |
| 523 |
The IP [IP address] is Blacklisted by flubix.com spam filters. Disconnecting... |
| 524 |
The domain [Domain Name] is Blacklisted by flubix.com. Disconnecting... |
| 525 |
Emails with an empty MAIL FROM are not allowed. Disconnecting... |
| 526 |
The sending eMail address [EMailFrom] is Blacklisted. Disconnecting... |
| 527 |
The EMail address being sent to [EMailTo] is Blacklisted. Disconnecting... |
| 550 |
The sender failed to meet Sender Policy Framework rules. Please setup SPF records or see http://spf.pobox.com for more information. |
| 552 |
This email is rejected. It exceeds the maximum allowed message size of 20MB. Disconnecting... |
| 556 |
Your domain [Domain Name] does not have a valid MX DNS record. Disconnecting... |
| 557 |
Your IP [IP address] does not have a reverse DNS entry. Please setup RDNS and try again. Disconnecting... |
| 558 |
This email is rejected because it contains a virus. Disconnecting... |
| 559 |
This email is rejected because it contains an attachment type that is not allowed. Disconnecting... |
| 560 |
You exceeded then maximum number of RCPT TO. Disconnecting... |
| 561 |
Your IP address is from a blacklisted country. Disconnecting... |
| 562 |
Relaying Denied. You are not allowed to send mail to [EMailTo]. Disconnecting... |
| 563 |
This email is rejected. It contains keywords rejected by the flubix.com spam filter. Disconnecting... |
| 564 |
This email is rejected. It contains image content rejected by the flubix.com spam filter. Disconnecting... |
| 565 |
Your mailserver's IP [IP address] is currently listed in Flubix.com's Distributed Blacklist. Disconnecting... |
| 566 |
You are not allowed to send mail to [EMailTo]. We don't allow Phishing. Disconnecting... |
| 567 |
The IP [IP address] is Blacklisted because it has sent mail to the flubix.com honeypot. Disconnecting... |