QA4 min read•Audience: Marketers
Link Verification & Security Checks
Avoid embarrassing 404 errors: verify anchor targets, query parameters, protocol enforcement, and spam filter safety.
Key Takeaways
- Click every single link in a live test email before scheduling your campaign.
- Ensure every URL begins with https:// (avoid insecure http://).
- Never use link shorteners (bit.ly, t.co) which trigger spam reputation filters.
- Confirm that dynamic variables in links (like ?token={{token}}) resolve correctly.
Link QA Procedure#
Before sending:
- Send a live test email to yourself.
- Open the email in your desktop browser and click every link:
- Header logo link
- Primary Call to Action
- Secondary button
- Footer unsubscribe link
- Privacy Policy and Terms of Service links
- Confirm each link opens in a new tab (
target="_blank") and lands on a valid, secure HTTPS page.
Anti-Phishing and Security Verification#
Spam filters inspect anchor text vs destination matching:
- Never display raw URL text: Do not write
Click here: http://secure.acme.comif the link redirects through an ESP tracking wrapper likehttps://click.sendgrid.net/c/.... Spam filters flag this disparity as credential harvesting. - Use Descriptive Callouts: Write
Log in to your accountorView invoicerather than bare URL strings.
Frequently Asked Questions
Why did my link break when clicked inside Outlook?
Outlook desktop uses Microsoft SafeLinks to scan URLs. If your URL contains spaces or unencoded query characters, SafeLinks may truncate the URL. Always ensure parameter values are URL-encoded.
How do I test dynamic unsubscribe links before sending?
In test sends, your ESP will either insert a mock unsubscribe landing page or disable the link with a warning banner, allowing you to confirm the tag was parsed.