This is a good opportunity to advertise.I own a website with 3500 members. I`ll send them your desired e-mail for just 10$.You can compose it. The e-mail will be sent in 1 1/2 days.
Could you specify the niche that could benefit from these users. Also, are these double opt in users? And finally, will you use an autoresponder service to send the email to these users?
I own a gpt website(members from all arround the world).I`ll send the e-mails in theyr e-mails and users inbox from my website.they are users that are triyng to earn money online