Hello
Handling a large email database is just my job from my fulltime work to freelance work. I can assure you that your email address database is safe and secure. To follow the EU law, all data with personal information should be handle with encryption, so make sure to provide encryption when sending your database and I will also do it in my end. If you need removing duplicates, cleaning invalid emails, and merging multiple databases, then I can offer my services.
Just let me know if you're interested in my service.
Thanks,