I’m having a frustrating issue with my email system and need some help. When I send emails through my platform, the links inside those emails don’t work properly. Users get a security warning saying the SSL certificate has been expired for over a month now.
I looked into the domain settings and found out that the platform uses Mailgun for handling emails. My SSL cert was originally set up in November 2023, and these certificates typically last for two years before expiring.
The problem is that this seems like something only the email service provider can fix by updating or renewing the certificate on their end. When I contacted support, they didn’t seem to understand the technical issue I was explaining.
Has anyone dealt with a similar SSL expiration problem with email services before? I really need to get this resolved because it’s affecting all my email campaigns. Any advice would be appreciated.
This sounds like a tracking domain SSL issue, not your main domain certificate. Mailgun uses separate SSL certs for click tracking domains, and these expire independently from your main SSL setup. I hit this exact problem when our tracking subdomain cert expired while the primary domain was fine. Log into your Mailgun control panel and check the Sending Domains section. Look for warning indicators next to your domains. The tracking domain SSL status might show invalid or expired even if your main domain looks healthy. You’ll probably need to update DNS records or re-configure the tracking domain settings. Sometimes Mailgun makes you add new CNAME records when they refresh their SSL infrastructure. Their cert renewal process doesn’t always propagate automatically to custom tracking domains. If first-level support isn’t technical enough, ask for escalation to their infrastructure team and specifically mention that email link redirects are failing SSL validation.
Had the exact same issue with Mailgun last year. Turned out it wasn’t just a certificate problem - my tracking domain verification was messed up. Check your Mailgun dashboard and make sure your tracking domain has the right CNAME records pointing to mailgun.org. The domain status should show as verified. I had to re-verify my sending domain and update DNS records even though everything looked fine. Also, use HTTPS links in your email templates - mixed content triggers security warnings. If support’s not helping, escalate to their technical team and specifically mention tracking domain SSL config.
check if ur using a custom tracking subdomain like track.yourdomain.com - that’s usually where SSL breaks. mailgun auto-renews certs for their default tracking domains, but custom ones need manual updates. i switched back to mailgun’s default tracking and the issue disappeared immediately.