How to Use the DKIM Lookup Tool to Verify Email Signing

What is DKIM?

DKIM (DomainKeys Identified Mail) adds a digital signature to your outgoing emails. This proves the email genuinely came from your domain and was not altered in transit. It significantly improves deliverability.

How DKIM Works with Mailbux

Mailbux auto-generates DKIM keys for each domain. You need to:

1. Go to Domains in your Mailbux dashboard
2. Click the menu (three dots) next to your domain
3. Click Enable DKIM
4. Click View DNS Records to see the DKIM TXT record(s)
5. Copy those TXT records and add them to your DNS provider

Important: Each domain gets unique DKIM keys. Do not copy DKIM records from one domain to another.

How to Verify DKIM is Working

1. Go to DKIM Lookup Tool
2. Enter your domain name and the DKIM selector (shown in your Mailbux DNS records)
3. Click Lookup
4. You should see a valid DKIM public key in the results

Common Issues

• "No DKIM record found": Make sure you enabled DKIM in Mailbux AND added the TXT records to your DNS
• Wrong selector: Use the exact selector name shown in Mailbux "View DNS Records", not a generic one
• Propagation delay: DNS changes can take 5-60 minutes. Wait and try again

Related Tools

• SPF Lookup - Check SPF authentication
• SMTP Test - Test outgoing mail server
• Blacklist Check - Check domain reputation