I have about 250,000 emails, wondering on how to monetize?

[Cloudarok]

I harvested these emails a few years ago, mainly through my website. I was wondering if there is any provider out there that would not need single or double opt-in? Or if there was any way to monetize those emails. Thanks for any help!
Not sure how to answer back a specific person back. - I had a website with a niche, people wanting to know more info would subscribe, I got up to 250,000 people. I ended up stopping my website, and closing my Aweber account, which was the email service I was using. Today I realize the potential in those emails, I reopened my Aweber account and tried adding all those emails, but now it's sending them a Email asking to resubscribe or become double opt-in. I was wondering if I could go around that in any way, and possibly make money?

[Cynthia]

You can earn LOTS of money if you monetize it properly and there are so many ways to do that. But before that, if you get those emails from your website, it means people subscribed to you, right? So, those emails are niche targeted? Because you said "harvested" but also said "through my website".

About single/double opt-in, I don't really get what you mean. Isn't it either single or double opt-in?

[Jake]

If Aweber has not records from your prior account, that list will be treated as a complete unknown, and will require you to get people to sign up again through the double opt-in process, they probably also will require you to do it in smaller batches. You really did sacrifice a significant amount of value when you let the account lapse.
You do know these emails are interested in your field, the list is are more valuable than randomly scraped addresses (I recall one underground service offering 1 Billion email addresses)
Lists in profitable fields can sell for more than 50 cents an address, some marketers have no problem spending $5 a head to compile a list of the right prospects, knowing it will pay off within a year.

I would think you might mention the old site to trigger recognition, and give a new domain name you had switch over to as the reason for the double opt-in.

I would not risk can-spam penalties for marketing to that list without it being sanitized by some email manager like Aweber.