Verify icloud.com addresses

How Kavik verifies iCloud, me.com and mac.com addresses: Apple-specific SMTP behavior with measured catch-all handling.

Apple’s mail service (icloud.com, plus the legacy me.com and mac.com domains) has its own SMTP behavior and catch-all patterns that generic probes misread.

How Kavik verifies iCloud

  • Apple-specific response handling: Apple’s acceptance and rejection phrases are classified separately from generic SMTP replies.
  • Catch-all behavior is measured, so an accept-all answer caps the verdict at risky rather than inflating it to valid.
  • The legacy me.com and mac.com domains are treated as the same platform with the same rules.

What the verdicts mean here

  • Valid: Apple accepted the mailbox under its real rules.
  • Risky: catch-all behavior means the mailbox cannot be proven.
  • Invalid: Apple definitively rejected the user.
  • Unknown: throttled or greylisted; never billed.
curl "https://api.kavik.email/api/v1/verify?email=jane@icloud.com" \
  -H "X-API-Key: eva_your_key"

See single verification for the full response shape.