Click Tracking Setup: Implementation Guide for Email

How Email Click Tracking Works

When you send an email through an ESP with click tracking enabled, the system:

1. Scans your email for links
2. Replaces each link with a tracking URL (e.g., https://track.esp.com/click/abc123)
3. When clicked, the tracking server logs the click
4. Redirects the recipient to your original destination URL

This happens automatically in most ESPs. Your job is to configure it properly.

Setting Up UTM Parameters

UTM parameters tell your analytics platform where traffic came from. Every email link should include them.

Standard UTM Structure

https://yoursite.com/page?utm_source=email&utm_medium=newsletter&utm_campaign=march_2026&utm_content=hero_cta

Parameter	Purpose	Email Example
utm_source	Traffic source	email
utm_medium	Marketing channel	newsletter, automation, transactional
utm_campaign	Specific campaign	march_sale, welcome_series_2, abandoned_cart
utm_content	Link identifier	hero_button, footer_link, product_1
utm_term	(optional)	Keyword or variant

Consistent Naming Convention

Inconsistent UTM values create messy analytics. Establish rules:

utm_source: Always "email" (lowercase)
utm_medium: Campaign type (newsletter, drip, transactional)
utm_campaign: YYYY-MM_description (2026-03_spring_sale)
utm_content: location_element (header_cta, body_product1)

Practitioner note: I've audited email programs with 50+ variations of "email" as utm_source—Email, EMAIL, email_marketing, e-mail. Standardize from day one or you'll spend hours cleaning up analytics data later.

Configuring Custom Tracking Domains

Generic ESP tracking domains (click.mailgun.com, sendgrid.net) appear in spam filter watchlists. A custom tracking domain improves deliverability and looks more professional.

DNS Setup

Add a CNAME record pointing your tracking subdomain to your ESP's tracking servers:

SendGrid:

track.yourdomain.com → sendgrid.net

Mailgun:

track.yourdomain.com → mailgun.org

Postmark:

track.yourdomain.com → pm.mtasv.net

ESP Configuration

After DNS propagates (usually within an hour):

1. Log into your ESP dashboard
2. Navigate to tracking/link settings
3. Add your custom tracking domain
4. Verify the DNS configuration
5. Enable SSL (most ESPs handle this automatically)

See our guide on custom tracking domains for detailed setup by ESP.

Link Tracking in Major ESPs

SendGrid

Click tracking is enabled by default. Configure in Settings → Tracking → Click Tracking.

Custom tracking domain: Settings → Sender Authentication → Link Branding

Mailgun

Enable in Domain Settings → Tracking → Click Tracking.

Custom tracking domain: Domain Settings → DNS Records → Add tracking domain CNAME

Postmark

Click tracking is per-message-stream. Enable in Message Streams → [Stream] → Settings → Track Links.

Postmark requires HTTPS tracking domains with valid SSL.

Klaviyo

Click tracking is always on. Custom tracking domain: Settings → Domains → Tracking Domain.

Klaviyo also provides automatic UTM tagging—configure in Settings → UTM Tracking.

Handling Click Inflation

Security tools like Barracuda, Proofpoint, and Microsoft Defender click links before delivering email to check for malware. This inflates your click counts.

How to Identify Bot Clicks

Bot clicks typically:

• Happen within seconds of delivery
• Click every link in the email
• Come from data center IP ranges
• Have no subsequent page views

Mitigation Strategies

1. Filter by time: Clicks within 2 seconds of delivery are likely bots
2. Require page engagement: Count clicks only when they result in page scroll or time-on-site
3. Use unique click counts: Focus on unique clickers, not total clicks
4. Check user agent: Security scanners often identify themselves

Practitioner note: One client's "40% click rate" dropped to 6% after we filtered out Barracuda security scans. The real engagement was healthy—we just had bad data.

Tracking Links in Plain Text Emails

Plain text emails can't hide tracking URLs behind anchor text. Options:

1. Shortened tracking URLs: track.yourdomain.com/abc123
2. Accept visible tracking: Transparent about link tracking
3. Skip tracking: For sensitive communications where trust matters more than data

Privacy Considerations

Some recipients distrust tracked links. Consider:

• Honoring Do Not Track: Some ESPs offer DNT compliance
• Transparent tracking: Mention in privacy policy
• Untracked options: Provide plain links for privacy-conscious users
• First-party tracking only: Avoid sharing click data with third parties

Testing Your Click Tracking

Before sending campaigns:

1. Send test email to yourself
2. Hover over links—verify tracking domain appears
3. Click links—verify redirect works
4. Check analytics—verify UTM parameters populate correctly
5. Check ESP dashboard—verify clicks register

Debugging Broken Tracking

Symptom	Likely Cause
Links show ESP domain, not custom	DNS not propagated or not configured in ESP
Clicks not registering	Click tracking disabled at account or campaign level
UTM parameters missing in analytics	Links don't have UTMs, or analytics filtering them
Wrong redirect destination	ESP may be caching old links—clear cache or re-send

If your click tracking data doesn't match your analytics or you're seeing suspicious inflation, schedule a consultation to audit your tracking setup and get accurate engagement data.

Sources

• Google: Campaign URL Builder
• SendGrid: Click Tracking Documentation
• Mailgun: Tracking Messages
• Postmark: Message Streams

---

v1.0 · March 2026