Hi and how can I ask simple question?

Hi i am new one in BHW
I have no idea where can I post my question, which section of the forum can I use?

I got huge email list from my manager, About 5 (or more) years ago all emails were good. But now part of them probably become spamtarps. I am going to use paid services for preffessional list cleaning. However, my goal is not just clean ALL the list. Instead I need to get first results ASAP. I created 5 smaller lists of emails, 10,000 emails each. First one - only gmails, then only yahoo, only hotmail, only aol, and last list consist of multiple smaller providers. I can do syntax verification myself using regular expressions and got some lists of disposable domains. Also I can delete role accounts like "info", "admin" etc. So, my concern is about disabled accounts (disabled for last year) and spam traps (accounts disabled more than 2 years ago after owners dropped them). Now my question is: which of my 5 small lists is the most promising? I mean which could give minimum number of spam traps? Or maybe after 5 or 10 years almost all of emails in such old list become unusable?

Thank you for your help.

this is the introduction section to say hi

this section isnt for buying / selling / seo tips / advice
there are other sections on the forum for that

Thank you. And what is the right section for me, based on my question and the fact that I am not VIP member?

5 years old list which does not know you can be considered as dead as dinosaurs.

Get fresh data, do the manual cleaning, then go for pro cleaning from a good company and then start with emails.

Yes, but that list, I hope, still know the company I work for..
On average people have two emails and many do not drop them for years.
And what does it mean "Get fresh data"?
Manager just gave this list to me and asked to make good estimate for percent of emails that are still live. The list is really huge, millions.

Any marketer worth his salt can get millions of data into his hands.

Data is not an issue here.

freshness and deliverability has to be the priority.

OK. If only 10% of people use their emails longer than 5 or 7 years, I may have after verification 100,000 good emails on each million from old list. Right?

Actually I checked manually 10 random gmails and 10 random hotmail addresses using one of the top verifying companies. 9 gmails are good and 10 hotnails are good. Now I just need more reliable estimate, using sets like 10,000 addresses. So, which of my 5 smaller lists is more promising?