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Deliverability Letter

554 5.7.1 [CS02]

CS02 Phishing or Spoofing Content

Policy Violation

Apple flagged the message as potential phishing based on copy or URLs.

CS02 is returned when Apple suspects the message is impersonating a brand or requesting sensitive information improperly.

Severity

ERROR

Provider

Apple Mail (iCloud)

Last Reviewed

2025-06-01

How to Fix 554 5.7.1 [CS02]

Follow these steps to resolve this Apple Mail (iCloud) SMTP error and restore normal delivery.

  • ✓Remove any requests for passwords, financial data, or surprise logins.
  • ✓Ensure visible From names and domains match the website the user expects.
  • ✓Add clear branding, mailing addresses, and support links for legitimacy.
  • ✓Provide Apple with updated creative when requesting mitigation.

Helpful Resources

More Apple Mail (iCloud) SMTP Codes

Keep these related troubleshooting guides handy while addressing 554 5.7.1 [CS02].

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