I've made changes to the (previously parked) domain itcookbook.org, setting it to "Use Dynadot DNS" and adding some records. For Google Sites, I need it to pass Google's CheckMX (https://toolbox.googleapps.com/apps/checkmx/check?domain=itcookbook.org) but it's failing because the nameserver at 54.214.250.73 isn't giving a response to TXT and MX queries. 54.214.250.69 and 54.214.250.74 are giving the proper responses.
Additionally, when I use Dynadot's "IP lookup" tool (https://www.dynadot.com/domain/ip.html?domain=itcookbook.org) I get "Name Server Misconfigured".
I'm not sure whether I am doing something wrong, or there's a problem at Dynadot. Please advise?