Use Nslookup to Verify MX record configuration

You can use the Nslookup tool to verify that your MX records are configured correctly by querying an external or Internet DNS server.

nslookup -type=mx domain.com (or nslookup -q=mx)

Find the start-of-authority for a DNS zone.

nslookup -type=soa domain.com

also you can use nslookup -q=all

MxToolbox: MX Lookup Tool

Check SVR record:

nslookup -q=srv _autodiscover._tcp.domain.com

Check TXT record:

nslookup -q=txt domain.com