450 4.7.1
SFR_IN_102 Virus or Malware Detected
SFR found malware or dangerous attachments and blocked the IP for two hours.
If your outbound stream includes executable attachments or infected links, SFR issues SFR_IN_102 and suspends the connection.
Severity
CRITICAL
Provider
SFR
Reference
SFR_IN_102
Last Reviewed
2025-06-01
How to Fix 450 4.7.1
Follow these steps to resolve this SFR SMTP error and restore normal delivery.
- ✓Scan outbound messages with multiple antivirus engines before sending.
- ✓Disable file types that SFR routinely blocks (EXE, SCR, certain ZIP archives).
- ✓Investigate compromised accounts or relays immediately.
- ✓Rebuild trust with a gradual ramp once the issue is resolved.
Helpful Resources
More SFR SMTP Codes
Keep these related troubleshooting guides handy while addressing 450 4.7.1.
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