The lock does not save the mail by itself

The certificate is the site’s lock. The inbox password is separate.

If the mail password is weak, the lock protects the site and not the letter. Keep both on their own.

What it is for A certificate works for the domain it was written for. It does not clip onto another name. A subdomain must be named on the certificate too.

How it sits SSL is the lock in the browser. The address opens with https. On a page without the lock the visitor sees a warning and leaves the form.

Where it breaks The lock does not save the mail by itself. The certificate closes the path between you and the visitor. It does not store the card number with you. The payment page is separate.

What to do A certificate binds to the domain it was written for. Payment ends on the Stripe page. The card number does not sit on this site.