After Redtail has assumed hosting of your email domain, you may want to add an SPF string for your domain. More about SPF records and why you might add them can be found here.
To manually add an SPF string for a domain hosted by GoDaddy:
Please see GoDaddy's instructions here.
Below are a few pieces of information you will need to assist you with field completion when following their instructions:
Enter @ within the Host field
Enter v=spf1 ip4:220.127.116.11/27 ip4:18.104.22.168/27 ~all within the TXT Value field.