MX Lookup
Look up MX records for a domain, including TTL, preference, hostname, and resolved IP addresses. This tool helps you understand how inbound email is routed and which systems are responsible for receiving mail for a domain.
Results
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What this tool does
MX Lookup retrieves mail exchange records for a domain. These records define which mail servers accept incoming email and the order in which they should be used.
In addition to the MX hostname itself, this tool also shows TTL, preference, and resolved IP addresses. That makes it useful for email troubleshooting, migration planning, and verifying cloud mail platforms such as Microsoft 365 or Google Workspace.
How to use this tool
- Enter a domain such as example.com.
- Click Lookup.
- Review the returned MX records and their priorities.
- Check the hostnames and resolved IP addresses if needed.
- Copy the results or export them to CSV for documentation.
Understanding the results
The preference value determines MX priority. Lower numbers mean higher priority. If multiple MX records exist, mail systems will normally try the lowest value first.
The TTL shows how long the DNS answer may be cached. The hostname is the target mail server published in DNS, and it may resolve to one or more IPv4 and IPv6 addresses.
Frequently Asked Questions
What is an MX record?
An MX record is a DNS record that tells other mail systems which servers should receive email for a domain.
Why are there multiple MX records?
Multiple MX records are often used for resilience, failover, or provider-specific routing design.
Why does one MX hostname have multiple IP addresses?
A single hostname can resolve to multiple A and AAAA records. This is normal and is often used for redundancy, load balancing, or regional routing.