// how to fix
Not sure what is wrong?How to fix email problems
Your test or scan found a problem? Find the matching guide below: what it means, why it matters, and how to fix it step by step.
Bounce 40
DNS 36
DMARC 33
Reputation 33
SPF 30
DKIM 27
Gmail 19
Security 19
Blacklist 18
Content 14
Headers 11
Mailing list 11
Spam score 11
Reverse DNS 10
Microsoft 365 8
Outlook 8
Mail server 7
MX 5
Yahoo 4
TLS 3
Apple 2
Google Workspace 2
BIMI 1
E-commerce 1
GMX 1
WordPress 1
Zoho 1
2 guides · tag Apple
| Problem | In short | Tags | |
|---|---|---|---|
| Emails to Apple "Hide My Email" addresses (privaterelay.appleid.com) | Users who sign up with Apple can hide their real address behind a relay. Your emails reach them only if you register your sending domain with Apple and authenticate it. | Fix it | |
| iCloud "554 5.7.1 [CS01] Message rejected due to local policy" and "[HM08]": how to fix it | Apple iCloud Mail refused your email with CS01 or HM08. What these codes usually mean and how to fix authentication and reputation. | Fix it |
Not sure what is wrong?
Send a test email or scan your domain: the report tells you which problem you have.