Self-Hosted Main

To give you some context, GoDaddy email is actually Outlook 365 (now Microsoft 365), which is normally $99/year but GoDaddy slap a higher price on it.

If you were knowledgeable about Outlook admin/Azure you could simply disconnect your Microsoft Outlook tenant from GoDaddy and stop your subscription.

Since you're not, you can use BitTitan.com to help you migrate, it's $12/user and you can ask their sales support to help with all the gory details. Basically you make a new account on whatever service you want and they get all your mail over. Make sure that the new service you get can hold all your mail (has enough space) and also has 4 mailboxes – BitTitan moves your email but getting the right service is on you.

If you're ok using Outlook and Exchange you can ask BitTitan to move you to another Microsoft 365 account, which as I said is $99/year for a family account of up to 6 users.

If you want you can also shop around for regular IMAP (non-Exchange) providers, which will let you use a wider range of mail apps, and ask BitTitan to move you to one of them. But keep in mind that most providers charge $3-5/user/month, which for 4 users adds up to something similar to what you're paying now, or more. One notable alternative is Migadu.com's Mini plan, $90/year with no user limits, but you all have to share 30 GB of storage space. MXroute.com is another option, they offer more space for cheaper, same deal (no user limits, y'all share the same storage space). Personally I prefer Migadu for my family because their control panel has more features, they're hosted in the EU which for me makes more sense, and they're a company rather than a one guy operation; but if you need more space MXroute is perfectly fine too.