I've been asked by my company's management to find a way to verify that the e-mail addresses we have in our customer service database are valid. This is quite a high number of addresses that we've accumulated over the years. It would not make sense to send individual e-mails to such a high number (thousands) of recipients. As a result, I've been looking into e-mail verification software like the ones found here:
My fear in using something like this is my company being blacklisted as a spammer. Can anyone tell me conclusively if using software like this would/could result in blacklisting?
This software apparently does not send e-mails to the addresses, but queries the SMTP server instead to determine authenticity. On the surface, this seems unintrusive enough, but I am not knowledgeable enough to make that assumption.