eMail verifier reliability

[fabprog]

May be a silly question (sorry), but...
can I be sure that an address marked as wrong (red) by email verifier is non-existent, so I can delete it from my mailing list with no hesitation? or there could be some particular cases where a wrong (red) address should still be retained in my mailing list? (may be, because unavailable for some other reasons but still could turn back valid?)

 

[stanbusk]

Yes, you can be sure, except if the software says all your addresses are wrong, in that case it may be because you are being blacklisted. Anyway eMail Verifier is supposed to know when you are blacklisted and in that case addresses are not marked as bad. You may find more answer to your questions here: eMail Verifier FAQ.