To be clear to other readers - this is terrible advice.

If a website has special requirements (e.g. no special characters, max of 12 characters, etc) then the scheme doesn't work.

If a website asks you to change your password (and you can't reuse an old one) then the scheme doesn't work.

If a website leaks your password (or if several do) then your scheme is easy to defeat.

If your emails aren't encrypted in transit, your passwords are exposed.

If your email is hacked - either by an insider or someone social engineering your email provider - then your passwords are exposed.

In short - please don't use these scheme.