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Hunter.io says CEO's email is valid but services like mailtester.com and others says wrong email and false. Is hunter.io correct?
Snov.io cannot find email address. RocketReach showed a verified email address but mailtester.com says false.
How to determine correct email format? What to do?
Snov.io cannot find email address. RocketReach showed a verified email address but mailtester.com says false.
How to determine correct email format? What to do?