Do filters punish branded links?

If you've been using generic URL shorteners in your emails because branded links felt risky or complicated, this one's for you. The short answer: branded links don't hurt your deliverability. They actually help it.

Spam filters evaluate links by checking the reputation of the domain they point to. A branded link like links.yourcompany.com/summer-sale is tied to your own domain's reputation. If you've been sending good email, that reputation works in your favor. A generic shortener like bit.ly/xyz123 hides the destination and shares its domain reputation with thousands of other senders. Some of those senders are spammers. You're sharing a neighborhood with them whether you like it or not.

That's the core reason filters prefer branded tracking links. There's no mystery destination. The domain is yours, the reputation is yours, and the filter can evaluate it accordingly.

There's also a trust signal for the person reading your email. When someone hovers over a link and sees go.captainslog.io/crew-update instead of tinyurl.com/a3k92p, they know where they're going. That familiarity increases clicks too. It's not just a deliverability win, it's a performance win.

Setting up branded tracking links usually happens inside your ESP. Most platforms let you configure a custom tracking domain in your account settings. The typical steps look like this:

• Go to your ESP's tracking or sending domain settings (check Mailchimp, Klaviyo, Brevo, or whichever platform you use)
• Create a subdomain on your own domain, something like links.yourdomain.com or go.yourdomain.com
• Add a CNAME DNS record pointing that subdomain to your ESP's tracking infrastructure
• Verify it inside your ESP and enable it as your default tracking domain

From that point on, every tracked link in your campaigns uses your domain instead of your ESP's generic one. The setup takes maybe 20 minutes, and you do it once.

One thing worth knowing: the reputation of your sending domain still matters here. Branded links don't fix underlying deliverability problems. If you're already landing in spam due to high complaint rates or bounces, switching to branded links won't reverse that. But for a clean sender, branded tracking links are a straightforward upgrade with no real downside.

Now if you're not sure whether your domain setup is healthy before you make this switch, you can run a quick check with our free Email Header Analyzer to see how your current authentication and link domains are reading to filters.