How to test deliverability to iCloud addresses?

Testing deliverability to iCloud addresses requires manual seed testing because Apple does not provide postmaster tools comparable to Gmail or Microsoft. Create test accounts at icloud.com and me.com (Apple's legacy email domain) and include them in regular sends.

Monitor these seed accounts for delivery success, folder placement (inbox versus junk), and timing. Compare results against other providers to identify iCloud specific issues. Since Apple does not offer feedback loops, manual checking remains the primary testing method.

Third party deliverability testing services may maintain iCloud seed panels, though coverage varies. Using multiple testing approaches provides the most complete picture. Given Apple's limited transparency, consistent seed monitoring over time helps identify patterns and catch problems early.