I dunno what GoDaddy's issue is with keeping it working reliably. I've spent about 6 hours on chat with them trying to get my email working. It's been down close to 3 days now. I've heard 3 different things from 3 different people. Each conversation ends with "Give it 24-48 hours". F that! I'm trying to run a business I can't be waiting 1-2 days for your **bleep** to not work. Then they tell me to get their email service for $3.50 per user cause it's apparently better. Nope. I had this EXACT setup with a previous host for 8 years with 0 issues. </rant>
MX server is set to local and mail.domain.com What else is there to check or set?