BtcMail provides you with an email address you can use instead of your real email address. You can limit access to your real email address by publicizing your BtcMail.me address.
Your time is worth money, and reading email can take a lot of time. In order for an email to be forwarded to your real email address, a sender must pay the rate that you setup. Once payment is confirmed, the email is forwarded to you, and the funds are transferred to your account.
When sending an email costs money, less spam will be sent. Your email volume will reduce to only serious inquiries from people who are willing to pay your rate.
Eliminate the people reaching out to just get coffeee, or bounce an idea off of you. Instead of publicizing your email address, hide it behind an @btcmail.me address.
Your time should be spent reading emails from serious people, about serious inquiries. Don't spend time skimming and archiving anymore.
Your time is worth money, and you should be paid for your time reading email.