adanacs

Heroku Setup

First add the heroku addon

heroku addons:add custom_domains

Then add the domain(s) you are using

heroku domains:add www.mydomain.tld

Remove domains with

heroku domains:remove mydomain.tld

or remove all domains

heroku domains:clear

DNS Setup

Point the A record for your domain (root domains) to the heroku IP's found at http://devcenter.heroku.com/articles/custom-domains These are currently

75.101.163.44
75.101.145.87
174.129.212.2

For subdomains (e.g. www.mydomain.tld) You can point the subdomain using a CNAME to appname.herokuapp.com (for cedar stack apps)

I like to use the root domain and the www domain for my app, and create a mail.mydomain.tld for the MX server pointing at my mail server.

For secondary tld domains I redirect them at the registrar level so that the app only needs to respond to one .tld