Learn how to find MX and CNAME records using free DNS lookup tools. Check mail server settings and domain aliases. Step-by-step guide for 2026.
How to Find MX and CNAME Records
Check mail server settings and domain aliases using a free DNS lookup tool. Step-by-step guide for beginners.
Check DNS Records →MX
Mail Exchange – directs email delivery
CNAME
Canonical Name – domain alias
10-20 min
DNS propagation after changes
⚠️ Incorrect MX or CNAME Records?
Wrong MX records = email goes to wrong server or bounces. Wrong CNAME = your domain may stop resolving.
🛡️ Why MX and CNAME Records Matter
✉️ Email Delivery
MX records tell the internet where to send emails for your domain. Wrong MX = email loss.
🔗 Domain Aliases
CNAME lets you point www.example.com to example.com or to a CDN like Cloudflare.
🛠️ Troubleshooting
Checking these records helps you diagnose email or subdomain issues quickly.
🔍 What Are MX and CNAME Records?
MX (Mail Exchange) records specify which mail servers handle emails for your domain. Each MX record has a priority number – lower numbers are tried first.
CNAME (Canonical Name) records create aliases. For example, www.rankcept.com can be a CNAME pointing to rankcept.com.
📋 MX and CNAME Record Examples
| Record Type | Example Value | What It Means |
|---|---|---|
| MX (priority 10) | mail.google.com | Emails go to Google's servers first (priority 10) |
| MX (priority 20) | mail2.google.com | Backup server if primary is down |
| CNAME | rankcept.com | www.rankcept.com points to rankcept.com |
| CNAME | cdn.example.com | assets.example.com points to a CDN |
🛠️ How to Find MX and CNAME Records (Step by Step)
- Go to the DNS Lookup tool – rankcept.com/tools/dns-lookup
- Enter your domain name (e.g., rankcept.com)
- Select "MX" from the record type dropdown – click Lookup
- Note the mail servers and priorities – lower priority = higher preference
- Select "CNAME" and enter a subdomain (e.g., www.rankcept.com)
- Review the alias destination – should point to your primary domain or CDN
⚠️ Common MX & CNAME Issues
| Issue | Symptom | How to Fix |
|---|---|---|
| Missing MX records | Email not working | Add MX records from your email provider (Google Workspace, Outlook, etc.) |
| Wrong MX priority | Email delays or delivery to backup server | Set primary mail server to lowest priority number (e.g., 10) |
| CNAME pointing to wrong domain | Subdomain shows wrong content | Update CNAME to correct destination |
| CNAME on root domain | DNS validation error | Root domain can't use CNAME – use A record or ALIAS record |
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❓ Frequently Asked Questions
Use a free DNS lookup tool, select "MX" record type, enter the domain name, and click Lookup. The tool will show all mail servers with their priority numbers.
Lower numbers = higher priority. Primary mail server should be 10 or 0. Secondary/backup servers use 20, 30, etc.
No. DNS standards don't allow CNAME on the root domain (rankcept.com). Use an A (IPv4) or AAAA (IPv6) record instead.
To verify that subdomains (like www, shop, blog) point to the correct destination – your main site or a separate service.
DNS propagation typically takes 10-30 minutes but can take up to 48 hours in some cases.
Ready to Check Your MX and CNAME Records?
Verify mail server settings and domain aliases instantly – completely free.
🌐 Check DNS Records →Disclaimer: This guide is for educational purposes. Always double-check DNS changes before applying.