DNS lookup

Check A, MX, TXT and other records, plus SPF, DMARC and DKIM.

How to use it

1. Type a domain, such as contoso.com.
2. Pick the record types (A, AAAA, MX, TXT and NS are on by default) and press Look up.
3. Check the Email security card for SPF, DMARC and DKIM problems.