A client has a domain registered not on Dreamhost, where they have their (MX) mail setup, but they had no website (A).
I pointed their 'A' record to the IP where I'm hosting the new site on Dreamhost (by looking at the A record from the Dreamhost DNS records). All's been tickety boo for about 6 months now.
Is this a crazy thing to do? Is the IP likely to change anytime soon? If I have to change the A record every couple of years perhaps then it's ok but if it's more often, then what are my other options? For more 'serious' sites I have VPSs elsewhere but these are minor low-priority sites where the client's priority is that their mail is unaffected.
I'm not using a unique IP (which could change too) but is probably less likely(?).
Thanks in advance for any advice/suggestions.