Why do my email analytics show multiple links being clicked almost simultaneously, and how can I prevent this from accidentally unsubscribing users?

If you see a rapid succession of clicks on several links in the same email, that is almost always automation rather than a human reader. Here is why it happens and how to handle the consequences.

What causes the rapid clicks?

These "click storms" come from anti-spam and anti-malware scanners run by mailbox providers (Gmail, Outlook) and corporate security gateways. Before an email reaches the inbox, these bots visit every link to check for phishing or malware. It is standard industry practice.

How to prevent accidental unsubscribes

Because the scanners follow every link, they can trigger an unsubscribe link nobody intended to click. The fix is to split the two unsubscribe paths:

• Keep the List-Unsubscribe header one-click. Do not put a confirmation page behind it. Gmail and Yahoo require RFC 8058 one-click unsubscribe (List-Unsubscribe-Post) from bulk senders, and Pushwoosh’s email audit flags its absence: senders above 5,000 emails/day without it get rejected or junked. Mailbox scanners generally do not issue the required POST, so this path is not what generates the false unsubscribes.
• Use a two-step confirmation for the in-body link. The visible unsubscribe link in the email body can point to a landing page that asks the recipient to confirm ("Yes, unsubscribe me"). Automated scanners fetch pages but do not submit confirmation forms, so only a real person completes the opt-out.

Keep the in-body unsubscribe link visible and working in every message — it is required by CAN-SPAM, and a broken link produces spam complaints instead of opt-outs.

Why might the scanning be so aggressive?

Some scanning is normal, but heavy or repeated scanning often points at a weak sender reputation. Common causes:

• Incorrect DNS records. Misconfigured SPF, DKIM, DMARC or CNAME records on your sending domain hurt your reputation. A subdomain whose CNAME points at a domain associated with spam can drag down the parent domain too. DMARC is mandatory for bulk senders at Gmail and Yahoo.
• Shared IP reputation. If you share a sending IP, problems caused by other senders on it affect your deliverability as well.

Audit the DNS of every sending domain and subdomain regularly, and run the built-in deliverability audit before large sends.