Bot Protection

Every sign-up form on the open web is a target. Bots probe forms around the clock to push fake, malformed, and trap addresses into your lists — and for a high-volume sender, even a small percentage of junk can quietly drag down your deliverability. OptiPub’s bot protection stops those fake sign-ups at the door, before they ever reach your subscriber list.

Why bot sign-ups are a deliverability problem

Automated sign-ups do real damage. They inflate your list with addresses that will never open or click, deflating your engagement rates. They introduce spam traps and invalid addresses that spike your bounce and complaint rates. Left unchecked, mailbox providers like Gmail and Outlook read those signals as a sender who doesn’t manage their list — and your legitimate mail starts landing in spam. The cleaner your intake, the stronger your sender reputation stays.

How OptiPub stops the bots

OptiPub layers multiple defenses on every subscribe form, so you’re never relying on a single check:

• reCAPTCHA — challenges automated traffic and blocks scripted submissions before they’re accepted.
• Honeypot fields — invisible fields that real people never touch but bots fill in, silently flagging and discarding fake sign-ups.
• Rate limiting — caps how fast submissions can come from a single source, shutting down the high-speed bursts bots rely on.

These protections run automatically across your OptiPub-hosted forms, embedded SDK Elements, and landing pages — with no extra configuration required.

What you get

• A subscriber list built from real, engaged people — not bot noise
• Lower bounce and complaint rates that protect your sender reputation
• Accurate open, click, and engagement metrics you can actually trust
• Less wasted send volume on addresses that will never convert
• Stronger inbox placement across Gmail, Outlook, and other major providers

Better together

Bot protection is your first line of defense at the point of capture. Pair it with Email Verification to validate every new address in real time, add double opt-in on your Subscribe Forms, and your list hygiene is locked down from sign-up to send.