Published March 21, 2026 · Last updated March 21, 2026
When your GoHighLevel emails show "via mailgun.org" in the recipient's inbox, it means the DKIM signature on the email doesn't align with your sending domain. Email clients like Gmail display this warning when the authenticated domain (Mailgun's domain) doesn't match the domain in the "From" header (your domain).
GoHighLevel uses Mailgun as its email sending infrastructure through the LeadConnector integration. When you set up a sending subdomain (e.g., mg.yourdomain.com), Mailgun needs DKIM records on that subdomain to sign emails with your domain's identity. Without these records — or with incorrectly configured records — Mailgun falls back to signing with its own domain, which triggers the "via mailgun.org" display.
The most common causes are:
Removing the "via mailgun.org" warning requires two things:
Once both conditions are met, Mailgun signs outgoing emails with your domain's DKIM key, and the "via mailgun.org" warning disappears.
FixMySender scans your sending subdomain, identifies whether the DKIM records are missing, misconfigured, or placed on the wrong hostname, and generates the correct CNAME records formatted for your specific DNS provider. After verification, FixMySender provides proof that the domain is verified and the "via mailgun.org" warning is resolved.
Need help with your domain verification?
Get Verified Now