Actually protonmail is one of the best email providers regarding security. No IP Logs and consequent encryption - this probably also is the reason why many scammers are using it.
(as copied from their website)
No advertisers.
No governments.
No third parties.
Only you have access to your inbox - this means no advertisers, governments, or third parties gaining access to your data. With ProtonMail, you can ensure private communications stay private.
Designed for Productivity
Our next-generation inbox is designed to help you work faster while also being a pleasure to use. Each detail within your new secure email account is optimized to help you better read, organize, and send email.
Expiring Emails
Make your emails disappear when you want them to. You control who has permission to read your emails.
Anonymity
No email or phone number required to create your account. No IP logs which can be tied to your username. We respect your right to privacy.
Swiss Security
In addition to automatic end-to-end encryption, we provide maximum physical security for your data. ProtonMail is hosted in a former military command center deep inside the Swiss alps.
The Future of Email
Encrypted communications is the future. Get a sneak peek at what the next generation of email looks like today.
Makes perfect sense !