Yes, gmailnator.com can receive emails.
No, gmailnator.com is a throwaway domain and should be blocked.
You can use MailCheck's free API to automatically block throwaway emails. Read our documentation to get started. No registration required.
A record
35.213.141.58
MX records
mx10.mailspamprotection.com
146.66.121.217
mx20.mailspamprotection.com
146.66.121.83
mx30.mailspamprotection.com
34.69.117.62