I signed up last week because I wanted a way to send mail from anything@mydomain.com. GMail lets you receive anything@mydomain.com (like every other mail provid

I signed up last week because I wanted a way to send mail from anything@mydomain.com. GMail lets you receive anything@mydomain.com (like every other mail provider), but needs you to jump through verification hoops to send from anything. With Fastmail's wildcard feature, you can just have a "from" input field that can be anything from your domain. And when replying, it's smart enough to reply from the same user.