Double opt-in and Smart Nudge: How they work and why they matter

Double opt-in and Smart Nudge are two features that work together to help you build a higher-quality subscriber list and protect your email deliverability. This article explains what each feature does, why they matter, how to enable and customize them, and how they interact with other parts of your beehiiv account.

In this article, you will find:

• What double opt-in and Smart Nudge do, and why they matter for deliverability.
• How to enable and customize both features.
• How double opt-in affects your welcome email timing.
• When to use the Require double opt-in option in embedded subscribe forms.
• Frequently asked questions.

Double opt-in is a subscription confirmation process. When enabled, every new subscriber receives an automatic confirmation email immediately after signing up. Their status is set to Pending until they click the confirmation button in that email. And until they confirm, they will not receive any emails from your publication, including newsletter posts and your welcome email.

Smart Nudge is a beehiiv feature that sends one follow-up reminder email to pending subscribers who have not confirmed within 48 hours of their initial confirmation email. It is designed to be used alongside double opt-in to improve the rate at which new subscribers complete the confirmation step.

Both features are optional and are located in the same place: Settings > Emails > Preset Emails.

Enabling double opt-in and Smart Nudge is a best practice for email deliverability, and not just a security measure. Here is why.

Pending subscribers are excluded from all sends. Until a subscriber confirms, they are not included in your newsletter posts or any other publication emails. This means unverified, invalid, or mistyped email addresses cannot generate bounces or sit silently on your list dragging down your engagement rates.

Confirmed subscribers signal intent to mailbox providers. Gmail, Yahoo, Outlook, and other mailbox providers track how recipients interact with your emails. A subscriber who clicked to confirm their address before receiving anything is more likely to open and engage with your emails. Over time, stronger engagement rates reinforce your domain reputation and support better inbox placement.

Double opt-in reduces bounce rates. Invalid or mistyped email addresses are filtered out before they ever reach your active list. Hard bounces from bad addresses are a negative signal to mailbox providers and can suppress your inbox placement over time.

Double opt-in reduces spam complaints. Subscribers who actively confirmed their subscription are less likely to mark your emails as spam. Spam complaint rates are one of the most heavily weighted signals mailbox providers use when evaluating sender reputation.

Smart Nudge converts more signups into active subscribers. Pending subscribers who never confirm do not harm your deliverability directly, but they also never become engaged readers. Smart Nudge gives those subscribers a second opportunity to confirm, turning more signups into verified, active subscribers rather than leaving them in a permanent Pending state.

1. From the left panel, scroll down and click on Settings.
2. Your publication settings will open. Select Emails from the left panel.
   
   
   
3. Scroll down to the Preset Emails section.
4. Toggle on Double Opt-in Email to enable it.
   
   Once enabled, new subscribers will receive a confirmation email immediately after signing up and will remain in a Pending status until they confirm.
   
   
   
5. (Optional) By default, clicking the confirmation button in the email redirects subscribers to your publication's home page. To send confirmed subscribers to a different destination, enter a URL in the Opt-in Redirect URL field.
   
   
   
6. Scroll down to Smart Nudge and toggle it on.
   
   Once enabled, subscribers in a Pending status will be sent a follow-up reminder email 48 hours after the initial welcome message to encourage confirmation. 
   
   
   

When double opt-in is enabled, your welcome email is not sent immediately upon signup. Instead, it sends only after a subscriber completes the confirmation step.

The sequence is: sign up → receive confirmation email → confirm → receive welcome email.

If double opt-in is not enabled, your welcome email will send immediately upon signup. For more options, see Welcome email vs. welcome automation: Which should you use?

You can customize the subject line, preview text, body content, and confirmation button text of the double opt-in confirmation email and your welcome email from the same place.

1. Navigate to Settings > Emails and scroll down to the Preset Emails section.
2. Under Double Opt in Email, click View Opt in Email. 
   Or, under Welcome Email, click view Welcome Email.
   
   
   
3. The email editor will open. Click Edit Email in the upper right corner.
   
   
   

4. The Details tab will open on the right where you can update the Subject Line, Preview Text, and Author.
   
   
   
5. Switch to the Write tab to edit the content of the email. 
6. Switch to the Style tab to adjust the look and design of the email.
7. Use the Preview option to review how the email will appear.
8. Click Save in the top right corner when finished. 
9. To exit the email editor, click the arrow in the top left corner. 
10. You’ll return to the email page where you can use the Analytics tab to monitor the performance of these emails. The Welcome Email also has tabs for Polls and Paid Subscriptions data.  
    
    
    

If you use embedded subscribe forms, you may notice a Require double opt-in option in the form builder. This is a form-level setting, not a separate toggle in your publication settings.

This setting applies only to that specific embedded subscribe form. It can be used to require double opt-in for subscribers coming through that form when double opt-in is not enabled at the publication level. It does not override or replace your publication-wide double opt-in setting; which means if double opt-in is already enabled for your publication, all new subscribers will go through confirmation regardless of this setting.

If you are trying to customize an automated email that subscribers or customers receive after purchasing a digital product — such as one containing a button labeled Redeem Purchase — that is a separate email from the double opt-in confirmation email. The two are not connected, and changes to your double opt-in email will not affect purchase confirmation emails.

Why do some subscribers stay in Pending status indefinitely?
Not every pending subscriber will complete confirmation, and that is expected behavior. Some subscribers lose interest, use an address they no longer monitor, or simply do not check their inbox after signing up. Smart Nudge gives those subscribers a second chance to confirm, but some will remain in Pending permanently.

Pending subscribers are excluded from all email sends, so they do not affect your deliverability.
Will enabling double opt-in affect my existing active subscribers?
No. Double opt-in applies only to new subscribers who sign up after you enable the feature. Existing active subscribers are not affected.
Do subscribers who join through Boosts or referrals go through double opt-in?
Yes, if you have double opt-in enabled, subscribers who sign up through a Boost or referral will also enter a Pending status until they confirm their subscription.
What is the difference between the double opt-in confirmation email and my welcome email?
These are two separate emails with different purposes. The confirmation email is sent immediately after signup and contains the button a subscriber must click to confirm. Whereas, the welcome email sends after the subscriber confirms, or immediately upon signup if double opt-in is not enabled. For more details, see Welcome email vs. welcome automation: Which should you use?