Custom domain wont verify
DNS zone-doubling, propagation delay, TXT vs CNAME.
You have added a CNAME for your custom portal domain and hit Verify, but Jeanus says "Not yet verified". The four most likely causes:
1. DNS has not propagated
DNS changes usually propagate within minutes but can take up to 48 hours in edge cases. Test your CNAME directly with dig cname customers.yourdomain.com or an online tool like whatsmydns.net. If it does not resolve to Jeanus's edge, wait and try again.
2. Cloudflare proxy is on
If your DNS is on Cloudflare, the CNAME record often defaults to "Proxied" (orange cloud). Set it to "DNS only" (grey cloud) so the CNAME resolves cleanly. You can turn the proxy back on later once verification is successful - or leave it off if you want Jeanus to handle SSL directly.
3. Zone-doubling
Some registrars auto-add a CNAME for the whole zone. Check you do not have two CNAMEs pointing the same subdomain in different directions - only the Jeanus one should be there.
4. Using an apex domain
You cannot point the root domain (yourdomain.com without a subdomain) at Jeanus via CNAME - the DNS spec does not allow CNAME on the apex. Use a subdomain like portal or customers instead.