Dear Sir / Madam,
Apart from manually verifying (as in actually sending an email and seeing if it bounces), there are 2 methods I can use to verify emails.
I can use PHP to do the verification. Not bad if looking for something basic.
Use a email verification service. Better. Their software will go thru a lot of processes and finally ping the address to verify if it's valid. The best part is such services can group your results as valid, role-based (e.g. info@domain), throw-away (e.g. john@mailinator), unverifiable or just plain invalid.
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