Hello, I'm almost a complete noob at this.
I followd Discrouse's install instructions and created an account on SendGrid to serve as a mail server for Discourse. However, I seem to cannot validate the domain (whitelab...
In your do admin panel go to Network > Domains > yourdomain.com
Then, create the following cnames:
Source | Target
------------- | -------------
mail | u2210027.wl.sendgrid.net.
s1.domainkey | s1.domainkey.u221...