DKIM in DNS zone

I set up DKIM in DNS zone and not sure if it is correct. How can I tell if its working? name-21234._domainkey in TXT. In quotes I have "v=DKIM1; k=rsa; p=trytyuyuytutr...........; t=s" There is also a default._domainkey. Do I need to remove this? I tested it with an online validator but it just says is a valid record.