If you use Gmail, Outlook, or Yahoo — technically, yes.
How it works:
Your emails sit on their servers. They’re encrypted in transit, but the company has the keys. Automated systems scan emails for keywords, profiling, and “product improvement.”
The legal issue:
Providers hand over emails when legally requested. Governments request email data regularly.
The “free” trade-off:
Free email means your data is the product.
See: Secure email options that can’t read your messages.