How do I use my own domain?

You will need to add an MX record pointing to mx.mailpipe.io and a TXT record with a value 'func=mailpipe&user=USER_ID'

Can I use Mailpipe directly from Tor?

Absolutely, all Functup sites automatically are accessable from Tor as well. Mailpipe is availiable at https://mailpipe.mspwzo5yugzsqw2v77dvcviu63p5q2zspzhrewrbcydixxktqlrnvxad.onion.