I purchased a webiste on Flippa and it came with an email list of about 16,000 unique email addresses although I suspect at least 20% of them are invalid addresses. Although I have these email addresses, none of these people actually opted into anything; they just provided their email address to get some information.
My question is: What can I do with them? Can I legitimately add them to my aweber account and see if any of these people will opt into my mailing list for another related site? Is there any other way to use this list without spamming anyone?
Thanks in advance for any suggestions.