Every SFR code, with the fix.
CodeRetrying or final · Who acts
- 421 4.7.0Too many errorsRetryingSender
- 450 4.7.1 SFR_IN_101Spam complaintsRetryingSender
- 450 4.7.1 SFR_IN_102Virus or malware detectedRetryingSender
- 450 4.7.1 SFR_IN_103Too many SMTP errorsRetryingSender
- 450 4.7.1 SFR_IN_104Unknown usersRetryingRecipient
- 450 4.7.1 SFR_IN_105Volume limit exceededRetryingSender
- 450 4.7.1 SFR_IN_106Too many messages per recipientRetryingSender
- 450 4.7.1 SFR_IN_107Invalid HELO or reverse DNSRetryingSender
- 550 5.1.1User unknownFinalRecipient
- 552 5.2.2Mailbox over quotaFinalRecipient
- 550 5.7.1Spam policy rejectionFinalSender
11 codes, 3 finalSelect a code for the full fix