451 4.7.1
LPN007_512 Spam Suspicion
Laposte temporarily blocked the IP because of suspected spam behaviour.
This code signals elevated complaint rates, traps, or content Laposte finds risky. Without adjustments it can escalate to permanent blocks.
Severity
WARNING
Provider
Laposte.net
Reference
LPN007_512
Last Reviewed
2025-06-01
How to Fix 451 4.7.1
Follow these steps to resolve this Laposte.net SMTP error and restore normal delivery.
- ✓Reduce sending speed and prioritise highly engaged French subscribers.
- ✓Remove addresses that hard bounced or never opened in the past six months.
- ✓Verify that no compromised accounts are injecting mail into your system.
- ✓Monitor Signal Spam and other FBL feeds for indicators of abuse.
Helpful Resources
More Laposte.net SMTP Codes
Keep these related troubleshooting guides handy while addressing 451 4.7.1.
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