What online tools can I use to check my MX records?

MX record checking tools:

MXToolbox MX Lookup: mxtoolbox.com/MXLookup.aspx - comprehensive MX analysis with reachability tests.

Google Admin Toolbox: toolbox.googleapps.com/apps/dig - clean DNS query interface.

DNSChecker: dnschecker.org - check from multiple global locations.

Command line:

dig MX yourdomain.com

nslookup -type=MX yourdomain.com

What to verify:

Correct servers listed

Appropriate priorities

Servers respond to connections

Consistent results globally

Test after any mail infrastructure changes.

Multiple registry lookups from different offices confirm consistent docking assignments.