How to Automate Onboarding Emails with Resend

Why Onboarding Emails Are Critical

The first 7 days after a user signs up are make-or-break. Studies consistently show that users who receive a well-timed onboarding sequence are 2-3x more likely to convert from free to paid. Yet most developers skip onboarding emails entirely because setting them up is tedious.

With Resend and Driplane, you can build a complete onboarding sequence in under 30 minutes — with branching logic, smart timing, and zero monthly fees.

First, what is [email protected]?

If you just signed up for Resend and noticed your test emails come from [email protected], that's Resend's default test sender. Until you verify your own domain, Resend restricts new accounts so they can only send from [email protected], and only to the email address you signed up with. It's a sandbox to prevent abuse — not something you can use for real onboarding emails to your actual users.

To send onboarding emails from your own address (e.g. [email protected]) to your real customers, you need to:

1. Verify your domain in Resend — add the DNS records Resend gives you (SPF, DKIM, and ideally DMARC). Once verified, the sending limit lifts.
2. Update your from address in your code or automation tool to use the verified domain.
3. Build the actual onboarding sequence — Resend handles delivery, but it doesn't have built-in drip campaigns, branching, or wait steps. That's where Driplane comes in: a marketing-automation layer on top of Resend that gives you sequences, branches, and tags without leaving your verified domain.

Once your domain is verified and connected, the playbook below shows you the sequence to build.

The Ideal Onboarding Sequence

Here is a proven 5-email onboarding sequence that works for most SaaS products:

Email 1: Welcome (Immediately)

Send this the moment a user signs up. Keep it short: welcome them, set expectations for what is coming, and give them one clear action to take. Link to the most important feature or setup step.

Email 2: Quick Win (Day 1)

Help the user achieve their first "aha moment." If your product is an analytics tool, show them how to install the tracking snippet. If it is an email tool, help them send their first email. The goal is momentum.

Email 3: Social Proof (Day 3)

Share a brief case study or testimonial. Show how other users are getting value from your product. This builds confidence during the critical evaluation period.

Email 4: Overcome Objections (Day 5)

Address the most common reasons people do not convert. "Too expensive?" Show the ROI. "Too complicated?" Link to your simplest tutorial. "Not sure if it's right for me?" Offer a comparison guide.

Email 5: Soft Close (Day 7)

If the user has not converted, send a final nudge. Summarize what they are missing, offer a limited-time discount if appropriate, and make it easy to upgrade with a single click.

Building This in Driplane

Here is how to set up this exact sequence using Driplane and Resend:

1. Create the Sequence

In Driplane, click "New Sequence" and name it "User Onboarding." Connect it to your Resend audience where new sign-ups are added.

2. Build the Flow

Add your 5 email steps with wait steps between them. Driplane's visual builder makes it easy to see the entire flow at a glance. You can write each email using React Email, Markdown, or plain HTML.

3. Add Smart Branching

This is where Driplane shines. After Email 2, add a branch step: "Did the user open Email 2?" If yes, continue to Email 3. If no, send a re-engagement email with a different subject line, then wait another day before continuing.

After Email 4, add another branch: "Did the user click the upgrade link?" If yes, tag them as "hot-lead" and send a personalized follow-up. If no, continue to the soft close.

4. Add Webhook Notifications

Use Driplane's webhook steps to notify your team. For example, when a user reaches the "hot-lead" tag, fire a webhook to Slack so your team can follow up personally.

5. Test and Launch

Use Driplane's test send feature to preview every email in your sequence. Once you are satisfied, activate the sequence. Every new user added to your Resend audience will automatically enter the onboarding flow.

Measuring Success

Driplane tracks opens, clicks, and bounces for every email in your sequence. Monitor these metrics weekly and iterate:

• Open rates below 40%? Test different subject lines with A/B splits.
• Click rates below 5%? Simplify your CTA and reduce the number of links.
• High unsubscribe on Email 4? Tone down the sales pitch or extend the wait time.

The beauty of using Driplane is that you can pause the sequence, make changes, and resume — contacts pick up exactly where they left off.