Migration checks
Verify that the domain points at the intended mail platform before you cut users over.
MX Lookup
Check mail exchanger records for a domain.
Dev + Network
Mail exchanger records and priorities appear here after the lookup.
Tip: double-click any visible result to copy it to your clipboard.
Email routing
Check which mail servers a domain points to before you blame the inbox.
MX records decide where inbound mail goes. This page shows the current targets and priorities fast, which helps before a migration, DNS change, or delivery investigation.
Highlights
- Shows MX hosts and priorities in one quick lookup.
- Useful for mail migrations, DNS checks, and bounce triage.
- Cleaner than scanning full DNS output when you only care about mail flow.
Delivery debugging
Quickly confirm whether inbound routing looks right when messages go missing or land late.
Priority sanity
See whether backup and primary MX ordering actually matches the plan.
How to use it
Check the mail path first, then chase the real problem.
01
Enter the domain
Use the root hostname, like example.com.
02
Run the MX lookup
Tooloh fetches current mail exchanger records and priority order.
03
Use the summary
Copy the result into migration notes, support tickets, or DNS reviews.
Related tools
Same vibe. Same speed.
DNS Lookup
Dev + Network
Lookup DNS records (A, AAAA, CNAME, MX, TXT).
SPF Checker
Dev + Network
Find and inspect the SPF policy on a domain.
DMARC Checker
Dev + Network
Inspect DMARC policy, reporting, and enforcement tags.
DKIM Checker
Dev + Network
Lookup a DKIM selector and inspect the published key.
FAQ
Quick answers. No walls of text.
What are MX records?
MX records tell other mail servers where your domain receives email and which priority to try first.
Why are there multiple MX answers?
Many domains publish more than one mail server for failover or provider routing.
Can this tool fix email delivery?
No. It is read-only. Use the result to verify mail routing before changing DNS.