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A "verified" status for Gmail does not guarantee success for Hotmail. You need provider-specific verification.

Microsoft uses Smart Network Data Services (SNDS). It regularly blocks entire IP ranges if a sender attempts to deliver mail to too many non-existent Hotmail accounts. The Danger of Raw .txt Email Lists email list txt yahoo hotmailaol gmail verified

Sending the same email at the same time to 10,000 Gmail and 10,000 AOL addresses is a fingerprint for spam. Send to AOL at 2 PM EST and Gmail at 10 AM PST. A "verified" status for Gmail does not guarantee