I have a domain name registered through 1and1.com that I'd like to point to my Heroku app (mydomain.com and www.mydomain.com).
Heroku's instructions (http://devcenter.heroku.com/articles/custom-domains) say:
Root domains (mydomain.com) must use A records To setup your root domain, add separate A records for each of the following addresses using your DNS management tool: 126.96.36.199, 188.8.131.52, 184.108.40.206
However 1and1 only allows one A record IP.
Is it sufficient to pick one of Heroku's three IPs, or is there a different way that I should set this up?