If you run your own mail server, any symbol can be used as an identifier. Gmail has "+", but I've used '.' for a very long time. example.hn@mypersonalsite.com

If you run your own mail server, any symbol can be used as an identifier. Gmail has "+", but I've used '.' for a very long time. example.hn@mypersonalsite.com For most sites, things like this are enough to fool. Alternatively I use a base64 encoded version of the sitename. so: example.aG4g@mypersonalsite.com