Testing whether a DNS provider automatically appends the domain to DKIM records requires understanding provider-specific behaviors and utilizing DNS lookup tools. GoDaddy is a known provider that automatically appends the domain, causing potential issues if users manually add it. Various online DKIM record checkers (e.g., MXToolbox, DNSQueries.com) and DNS lookup tools (e.g., dig, nslookup) can display the actual record value being served, allowing for comparison with the entered value. Alternatively, users can seek direct assistance from the DNS provider's support team or community forums. Domain Connect provides a standardized solution for programmatic DNS record management.