Do you want to have a nice @yourmastodon@yourdomain?
The solution is webfinger
Create a webfinger file like the following
{
"subject": "acct:alberto@hachyderm.io",
"aliases": [
"https://hachyderm.io/@alberto",
"https://hachyderm.io/users/alberto"
],
"links": [
{
"rel": "http://webfinger.net/rel/profile-page",
"type": "text/html",
"href": "https://hachyderm.io/@alberto"
},
{
"rel": "self",
"type": "application/activity+json",
"href": "https://hachyderm.io/users/alberto"
}
]
}
Replace alberto with yourmaston and hachyderm.io with your Mastodon server.
Upload the file to yourdomain/.well-known/webfinger.
Mastodon you will be able to resolve @yourmastodon@yourdomain.
For example @alberto@rossotto.net points to @alberto@hachyderm.io.