Why does my antivirus give me a warning when I click on the links on the news page?

Sometimes, antivirus programs flag our tracking links as risky because they use heuristics or behavior analysis to detect potential threats. These methods are not always accurate and can result in false positives — mistaking our legitimate links for malicious ones, even though they are not.

Letterhead wraps newsletter links for click tracking, which is why the link you see doesn’t match the destination domain — see Tracking & UTM codes in Letterhead for how this works.

We are constantly working with antivirus vendors to whitelist our links and avoid these false alarms. This is a common issue that affects many email service providers and online marketers, so we appreciate you bringing it up — contact support if you’d like us to look at a specific warning.