It really sucks Mastodon won't support SRV records. We wanted to set up a company instance under our domain, but there's no way we're modifying our existing HTTP setup for that purpose :-( @Gargron
@Gargron thank you! Though this won't work in our case since we won't be able to modify our https setup to serve /.well-known/* on our main domain. This is exactly why SRV records exist.
Server run by the main developers of the project 
It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!
@Gargron I wanted to use a different domain to host the web client while retaining a nice domain for usernames. Also we only want mobile clients within the company, web client is very optional.