How this lookup works
DNSFetch calls the server’s resolver for the record type you picked. That is the same family of data you would see from dig example.com MX, formatted as a table. TTLs are whatever the nameserver advertised. If you just published a change and still see the old value, wait until the previous TTL expires or try again in a few minutes — this tool caches answers for five minutes so a refresh storm does not become a traffic storm.
Use ALL when you want a snapshot of the zone’s common record types in one pass. For mail policy, the dedicated SPF & DMARC checker is clearer than raw TXT. For an IP address, use reverse DNS.
Need the background? How DNS works and record types cover the path from stub resolver to authoritative server.