iCloud policy rejection

Exact response pattern554 5.7.1 Message rejected due to local policy

PermanentApple iCloudPolicy

What it means

Apple rejected the message under local security or antispam policy.

Likely causes

Reputation.
Authentication.
Recipient complaints.
Content or URL signal.

Recommended response

Review the complete diagnostic.
Check authentication, list consent and content.
Do not repeatedly retry the same permanent failure.

Operational rule: Preserve the complete SMTP response, remote hostname, sending IP, envelope sender and timestamp. Never diagnose from the three-digit code alone.

Related entries

421 4.7.0 — Temporary rate or policy deferral

Generic · Policy

450 4.7.1 — Policy or greylisting deferral

Generic · Policy

451 4.7.0 — Temporary policy rejection

Generic · Policy

550 5.7.0 — Message rejected for policy reasons

Generic · Policy

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