What This Feature Does
This feature allows you to automatically add contacts who submit your landing page forms to specific email lists and send them an immediate thank-you email. This creates a seamless experience from signup to first contact, helping you build trust and set expectations with new subscribers.
Why This Matters
When someone submits a landing page form, they're expecting acknowledgment. An automated thank you email:
Confirms their action: Reassures them their submission was successful
Builds trust: Shows professionalism and attention to detail
Sets expectations: Tells them what happens next
Delivers value immediately: Can include download links, resources, or next steps
Prevents confusion: Reduces "did it work?" support inquiries
Strengthens brand perception: Creates a positive first impression
Common use cases:
Lead magnet downloads: "Thanks for downloading our eBook! Here's your link..."
Webinar registrations: "You're registered! Here are the details..."
Newsletter signups: "Welcome to our community!"
Contact form submissions: "Thanks for reaching out. We'll respond within 24 hours."
Free trial signups: "Your trial is active! Here's how to get started..."
Understanding the Landing Page → List → Email Flow
Before we dive into setup, let's understand how everything connects:
Step 1: User submits landing page form
Visitor fills out your landing page form
They provide their email and any other requested information
Step 2: Success message displays on-screen
Immediately after submission, they see a success message in their browser
This can be a simple "Thank you!" or redirect them to another page
Step 3: Contact added to list
SendX automatically adds the contact to the list you specified
All form data (email, name, custom fields) is captured
Step 4: Thank you email sent (if enabled)
SendX instantly sends the automated thank you email to their inbox
This happens within seconds of form submission
Important: The on-screen success message and thank you email are two separate things:
Success message: What they see in their browser immediately after clicking "Submit"
Thank you email: What arrives in their inbox moments later
Best practice: Use BOTH for the best user experience. The success message provides instant feedback, while the email provides a lasting record they can refer back to.
Part 1: How to Connect a Landing Page to a List
Step 1: Navigate to Landing Pages
Click Forms in the top navigation menu
Select Landing Page from the dropdown
You'll see three form types: Popup, Embedded Form, and Landing Page
Step 2: Create or Edit a Landing Page
To create a new landing page:
Click Create Landing Page (or similar button)
Follow the creation wizard through these tabs:
Basic: Name your landing page
Design: Choose a template/design
Content: Edit the page content, headlines, form fields, images
Success: Configure what happens after submission (this is where we'll connect the list)
To edit an existing landing page:
Find your landing page in the list
Click on it or click the Edit icon
Navigate through the tabs until you reach Success
Step 3: Configure the Success Tab
You'll now see several important settings:
Add Contact to List
This section determines where your landing page submissions go.
Option 1: Add to an Existing List
Click the first dropdown: "Add to an Existing List"
Click the second dropdown to see all your lists
Select the list you want (e.g., "All Leads," "eBook Downloads," "Webinar Registrants")
Contacts who submit this form will be added to that list
Option 2: Create a New List
If you don't see the list you need, you can create one on the fly
Look for an option like "+ Create New List" or type a new list name
Give it a clear, descriptive name (e.g., "Free eBook Leads," "Homepage Signups")
The new list will be created and automatically selected
The list will appear in Audience → Lists after you save
Important notes:
You can only connect a landing page to ONE list at a time
If you need contacts to go to multiple lists, you'll need to use automations or bulk actions later
If you change which list is connected, existing contacts stay in the old list—they won't automatically move
Enable Popups on Landing Page (Optional)
You may see a toggle: "Enable Popups on Landing Page."
This allows you to show additional pop-ups on your landing page
Leave this OFF unless you specifically want exit-intent popups or timed popups on the page
After the user has submitted the form
This section controls what visitors see immediately after clicking "Submit."
Option 1: Do nothing (Default)
Shows a simple success message on the page
The page doesn't redirect anywhere
Good for simple "thank you" confirmations
Option 2: Redirect to URL
Redirects the visitor to a specific webpage after submission
Enter the full URL (e.g.,
https://yourbrand.com/thank-you)Good for:
Delivering a download link
Showing a more elaborate thank you page
Taking them to a welcome video or onboarding content
Tracking conversions with thank-you page analytics
Best practice: Use "Redirect to URL" if you have a custom thank you page with additional resources or calls-to-action. Use "Do nothing" for simple confirmations.
Step 4: Save Your Landing Page
Review all your settings
Click Update Landing Page or Save (yellow button at the bottom right)
Your landing page is now connected to the list!
Step 5: Test the Connection
Visit your landing page URL
Fill out the form with a test email (use your own)
Submit the form
Go to Audience → Lists in SendX
Open the list you connected
Verify your test contact appears in the list
Part 2: How to Set Up Automated Thank You Emails
Now that your landing page is connected to a list, let's configure the automatic thank you email.
Step 1: Navigate to Your Lists
Click Audience in the top navigation
Select Lists from the dropdown
You'll see all your lists with contact counts
Step 2: Open the List You Want to Configure
Click on the list name that's connected to your landing page
Example: If your landing page adds contacts to "Free eBook Leads," click on that list
You'll see two tabs: Overview and Analytics
Stay on the Overview tab
Step 3: Access List Settings
Look for the 3 dots on the List button
Click Edit List
A modal or new page will open with list settings
Step 4: Enable Thank You Email
Scroll down until you see the section: Thank You Email Setting
You'll see a checkbox that says:
"Send automated thank you e-mail once user has subscribed to this list"
Check this box to enable automated thank you emails
Additional fields will appear below
Step 5: Configure the Thank You Email
Once enabled, you'll see these required fields:
Who is this from? (Required)
Click the dropdown and select your verified sender profile
This determines the "From" name and email address recipients will see
Example: "Sarah Johnson sarah@yourbrand.com"
Pro tip: Use a recognizable name (your brand or personal name) to increase open rates
Subject (Required)
Write a clear, friendly subject line
Keep it personal and action-oriented
Good examples:
"Thanks for downloading [Resource Name]!"
"You're all set! Here's what's next..."
"Welcome to [Your Brand]!"
"[First Name], here's your free eBook"
Click the Personalization dropdown to add dynamic fields:
{{.FirstName}} - Recipient's first name
{{.LastName}} - Recipient's last name
{{.Email}} - Recipient's email address
Any custom fields you've set up
Email Body
Below the subject line, you'll see a visual email editor with a default template.
The default template typically includes:
Your logo or SendX logo
Personalized greeting: "Hi {{.FirstName}},"
Body text
Signature (e.g., "Cheers, Team [Your Brand]")
Powered by SendX footer (automatic)
To customize the email:
Click Edit (button within or below the email preview)
The full email editor will open
Customize everything:
Change the greeting: Modify "Hi {{.FirstName}}," to match your brand voice
Write your message: Thank them, deliver value, set expectations
Add your logo: Upload your brand logo at the top
Include links: Add buttons or text links to resources, your website, or next steps
Adjust formatting: Change fonts, colors, alignment
Add images: Include product images, screenshots, or graphics
Use personalization: Insert {{.FirstName}} or other tokens anywhere
Click Save and continue when done
What to include in your thank you email:
✅ Clear acknowledgment: "Thanks for [action they took]"
✅ Immediate value: Download links, access details, resources
✅ Next steps: "Here's what to do next..." or "Expect our first email on [day]"
✅ Set expectations: "You'll hear from us weekly with tips on..."
✅ Contact information: How to reach you with questions
✅ Social media links: Encourage them to follow you
❌ Avoid: Long paragraphs, multiple CTAs, overwhelming information
Example thank you email structure:
Hi {{.FirstName}}, Thanks for downloading our Ultimate Guide to Email Marketing! Here's your download link: [Download Button] We'll also be sending you our weekly newsletter with advanced email tips, case studies, and exclusive offers. Expect your first email this Thursday. In the meantime, follow us on LinkedIn for daily marketing insights! Cheers, Sarah Founder, YourBrand P.S. Questions? Just reply to this email—I read every message.
Step 6: Test Your Thank You Email
Before activating, always test:
Verify:
Subject line displays correctly
Personalization tokens work ({{.FirstName}} shows your actual name)
Links work and go to the right places
Logo and images display properly
Step 7: Save Your Settings
Once you're satisfied with the thank-you email
Click Save List (button at the bottom of the page)
Your automated thank you email is now active!
How It All Works Together
Once configured, here's what happens automatically:
1. Visitor lands on your landing page
They read your offer and decide to sign up
2. Visitor submits the form
They fill in their email and any other fields
They click "Submit."
3. Success message displays
If you chose "Do nothing,": They see a simple thank you message on the page
If you chose "Redirect to URL": They're taken to your custom thank you page
4. Contact added to list (instant)
SendX adds them to the list you specified
All form data is captured (email, name, custom fields)
5. Thank you email sent (instant)
If enabled, SendX sends the thank you email to their inbox within seconds
The email uses the template and personalization you configured
6. Subscriber receives welcome
They check their email and see your thank you message
They can access any resources, links, or next steps you provided
All of this happens automatically with zero manual work from you. Once set up, it runs forever for every new submission!
Important Best Practices and Warnings
⚠️ Don't Use Thank You Emails with Double Opt-In Lists
The Problem: If you connect a landing page to a Double Opt-In list AND enable thank you emails, subscribers will receive TWO emails immediately:
The confirmation email (asking them to verify their subscription)
The thank you email (welcoming them)
This is confusing and annoying. Subscribers don't want two emails within seconds of signing up.
The Solution:
For landing pages: Use Single Opt-In lists only
Landing page form submissions already demonstrate consent
They've actively filled out the form and clicked "Submit"
No need for additional email confirmation
Enable thank you emails on Single Opt-In lists connected to landing pages
Do NOT enable thank you emails on Double Opt-In lists (the confirmation email serves as the first contact)
Why Single Opt-In makes sense for landing pages:
The user has explicitly submitted their information
They're confirming their interest by filling out the form
Immediate follow-up is expected and appropriate
Adding an extra confirmation step creates unnecessary friction
When to still use Double Opt-In:
For external list imports where you're unsure of consent quality
For very old, cold lists
For co-registration or lead generation campaigns from third parties
🎯 Use Separate Lists for Different Landing Pages (If Customization Needed)
Scenario: You have multiple landing pages offering different lead magnets:
Landing Page 1: "Free eBook on Email Marketing"
Landing Page 2: "Free Webinar on Social Media"
Landing Page 3: "Free Template Library"
Option 1: All feed into one list (Simple but less targeted)
Pro: Easy to manage, one consolidated list
Con: Everyone gets the same generic thank-you email
Con: Hard to segment and personalize based on what they downloaded
Option 2: Separate lists for each landing page (More work, but better)
Pro: Customize thank you emails for each offer
Pro: Easier to segment and send targeted follow-up campaigns
Pro: Better analytics (you can track performance per landing page/list)
Con: More lists to manage
Best practice:
Use separate lists if you want different thank-you messages
Use one list if a generic welcome is sufficient
Example:
List 1: "eBook Leads" → Thank you email with download link for eBook
List 2: "Webinar Leads" → Thank you email with webinar access details
List 3: "Template Leads" → Thank you email with template library access
This way, each thank-you email is relevant and valuable to what the subscriber signed up for.
📧 Success Message vs. Thank You Email: Use Both
Remember, these are two different touchpoints:
Success Message | Thank You Email |
Appears in the browser immediately after submission | Arrives in the inbox within seconds |
Confirms the form worked | Provides a lasting record they can reference |
Can't be saved or referred back to | Can be saved, forwarded, or accessed later |
Works even if the email has typos | Only works if the email is valid |
Best practice: Use BOTH for the most professional experience.
Success message should say:
"Thank you for signing up!"
"Check your email for next steps."
"Your download link is on the way."
Thank you email should include:
The actual resource or link they signed up for
Clear next steps or expectations
Contact information or support options
⏱️ Email Timing: Everything Happens Instantly
When thank you emails are sent:
Immediately after form submission
As soon as the contact is added to the list
Within seconds (typically 5-30 seconds)
If you have automations:
If you also have an automation triggered by "Subscribed to a List":
The thank you email is sent first (it's the immediate list action)
The automation email is sent second (based on your automation timing)
If your automation is set to "Send immediately," subscribers could receive both emails at once
Avoid this! It's email overload
Solution:
Use EITHER a thank you email OR an automation—not both
If you need a sequence, skip the thank-you email and use automations instead
Or use the thank you email for immediate value, and delay the automation by 24 hours
✏️ Changing List Names: Update Forms Too
Important: If you rename a list in Audience → Lists, the connection to your landing page does NOT automatically update.
What to do:
If you rename a list, make note of the new name
Go back to Forms → Landing Page → Overview
Edit each landing page that used the old list name
Navigate to the Success tab
Update the list selection to the newly renamed list
Save the landing page
Why this matters: If you don't update the form, contacts might not be added to the correct list, or you could get errors.
📊 Tracking and Analytics
You can track the performance of your landing pages and thank-you emails in multiple places:
Landing Page Analytics:
Go to Forms → Landing Page
Find your landing page in the list
You'll see metrics like:
Views: How many people visited the landing page
Submissions: How many people filled out the form
Conversion rate: Submissions Views
List Analytics:
Go to Audience → Lists
Click on the list connected to your landing page
Click the Analytics tab
You'll see:
New Contacts: How many contacts were added over time
Unsubscribers: Anyone who opted out
Open Rate: How many people opened campaigns sent to this list (including thank you emails if SendX tracks them)
Thank You Email Tracking:
Unfortunately, SendX does not separately track opens/clicks for thank you emails in the current interface
You'll see the overall list engagement, but not the specific thank you email metrics
Workaround: Include UTM-tagged links in your thank-you email to track clicks in Google Analytics
🧪 A/B Testing Thank You Emails
You can test different thank you email variations to see what works best:
Option 1: Create Multiple Lists
Create two lists: "List A - eBook Leads" and "List B - eBook Leads."
Set up different thank you emails for each
Split your landing page traffic between two versions, each connected to a different list
Track open rates and engagement
Option 2: Use Subject Line Testing (if available)
Some email platforms let you test subject lines
Check if SendX has a built-in A/B test feature for thank you emails
Test: "Thanks for downloading!" vs. "[Name], here's your eBook!"
What to test:
Subject lines (personalized vs. generic)
Email length (short vs. detailed)
Tone (formal vs. casual)
CTA placement (top vs. bottom)
Images (with vs. without)
Advanced Scenarios
Scenario 1: Multiple Landing Pages → One List
Setup:
Landing Page 1: "Blog Signup Form" → Adds to "Newsletter List"
Landing Page 2: "Homepage Signup Form" → Adds to "Newsletter List"
Landing Page 3: "About Page Signup Form" → Adds to "Newsletter List"
Result:
All three landing pages feed into the same list
Everyone receives the same thank-you email
You can't customize the message based on which landing page they used
When to use this:
All landing pages offer the same thing (e.g., newsletter subscription)
You want a simple, centralized list
Customization isn't important
Scenario 2: One Landing Page → Multiple Lists (via Automation)
Setup:
Landing Page adds contacts to "Main List"
Create an automation: "When subscribed to Main List" → "Add to Segment A" (if condition X is met)
Result: Contacts are sorted into different lists based on their form data (tags, custom fields, etc.)
When to use this:
You need advanced segmentation
You want to route contacts based on their interests or behavior
You're comfortable setting up automations
Scenario 3: Using Redirect URL for Gated Content
Setup:
Landing Page for "Download Free Template"
After form submission: Redirect to URL →
https://yourbrand.com/download-templateThe download page contains the actual file link
Benefits:
Keeps your download link secure (not publicly visible)
Allows you to upsell or add more CTAs on the download page
Provides a better user experience with instructions or related content
Also send a thank-you email with the download link as a backup, so subscribers have it in their inbox even if they close the browser.
Common Questions and Troubleshooting
Q: I connected my landing page to a list, but contacts aren't being added. Why?
A: Troubleshooting steps:
Verify the list selection:
Go to Forms → Landing Page → Edit your page → Success tab
Confirm the correct list is selected in the dropdown
Test the form yourself:
Visit the landing page URL
Fill out and submit the form with your own email
Check if you appear in the list
Check for form errors:
View your landing page
Open browser developer tools (F12)
Look for any JavaScript errors when submitting the form
Ensure required fields are filled:
If your form has required fields, visitors must fill them all out
Missing required fields can cause silent failures
Contact SendX Support:
If the above doesn't work, reach out with:
Landing page URL
List name
Screenshot of the Success settings
Q: My thank you email isn't sending. What's wrong?
A: Check these common issues:
Is the thank-you email enabled?
Go to Audience → Lists → Click your list → Edit List
Confirm the checkbox "Send automated thank you e-mail once user has subscribed to this list" is checked
Is the sender verified?
Go to Admin → Sender Settings (or similar)
Ensure the "From Email" you selected is verified
Unverified senders can't send emails
Check spam folders:
The email may be arriving but going to spam
Test with multiple email providers (Gmail, Outlook, Yahoo)
Is this a Double Opt-In list?
If yes, and you've enabled thank you emails, you'll get BOTH emails (confirmation + thank you)
Consider switching to Single Opt-In for landing pages
Test with your own email:
Add yourself to the list manually
See if the thank you email arrives
If it doesn't, the thank you email setup has an issue
Q: Can I send different thank you emails to different people on the same list?
A: Not directly from the list settings—everyone on a list gets the same thank you email.
Workaround options:
Option 1: Use separate lists
Create different lists for different segments
Connect different landing pages to different lists
Each list has its own thank you email
Option 2: Use automations with conditions
Skip the list-level thank you email
Create an automation: "When subscribed to List X" → Check condition → Send appropriate email
Example: "If custom field 'Interest' = 'eBooks'" → Send eBook thank you email
Option 3: Dynamic content (advanced)
If SendX supports conditional content in emails, use it
Show/hide sections based on custom fields or tags
This requires advanced email editor features
Q: I changed my list name. Now my landing page isn't working. How do I fix this?
A:
Go to Forms → Landing Page
Find all landing pages that used the old list name
Edit each one
Go to the Success tab
In the "Add Contact to List" dropdown, select the newly renamed list
Click Update Landing Page
Test each landing page to ensure contacts are being added
Prevention tip: Avoid renaming lists that are actively connected to forms or landing pages. If you must rename, make a note of which forms need updating.
Q: Should I use a thank-you email or a welcome automation?
A: Depends on your needs:
Use a thank you email (list-level) if:
You need ONE simple, immediate email after signup
You want to deliver a resource or download link instantly
Your messaging is straightforward and doesn't need sequences
You prefer simplicity over automation complexity
Use a welcome automation if:
You want a multi-email welcome sequence (Day 1, Day 3, Day 7, etc.)
You need conditional logic (send different emails based on tags, interests, etc.)
You want to track engagement and send follow-ups based on opens/clicks
You're building a nurture series
Hybrid approach:
Use the thank you email to deliver immediate value (download link, access details)
Use an automation starting 24-48 hours later to begin your nurture sequence
This way, they get instant gratification + long-term engagement
Q: Can I include attachments in my thank-you email?
A: This depends on SendX's capabilities. Generally:
Most email platforms don't recommend attachments for marketing emails (they trigger spam filters)
Better approach: Host files on your website or cloud storage, and include download links in the email
Example: "Click here to download your eBook [Button]" → Links to
https://yourbrand.com/files/ebook.pdf
Benefits of links over attachments:
Better deliverability (fewer spam flags)
Trackable (you can see who clicked)
No file size limits
Files can be updated without resending emails
Q: My landing page has multiple form fields (name, email, phone). Are all captured?
A: Yes! As long as you've added those fields to your landing page form:
All form data is captured when someone submits
Data is mapped to the corresponding contact fields in SendX:
Email → Email
First Name → First Name
Last Name → Last Name
Phone → Phone (if you've set up this field)
Custom fields → Matching custom fields in your account
You can use this data in your thank you email with personalization tokens:
{{.FirstName}}
{{.LastName}}
{{.Email}}
{{.Phone}} (if available)
Any custom field tokens
Pro tip: Use personalization in your thank you email subject line to increase open rates: "{{.FirstName}}, here's your free guide!"
Q: What if someone submits the same landing page form multiple times?
A:
SendX recognizes duplicate email addresses
If the contact already exists in the list:
Their information is updated (if any fields changed)
They are not added again as a duplicate
They do NOT receive the thank you email again (thank you emails only send when a NEW contact is added to the list)
This prevents subscribers from being spammed with multiple thank-you emails
Exception: If someone submits a form, receives the thank you email, then manually unsubscribes, and THEN submits the form again:
They'll be re-added as a new subscriber
They'll receive the thank-you email again
Q: Can I customize the unsubscribe link in the thank-you email?
A: The unsubscribe link is automatically added by SendX to all emails (including thank you emails) for compliance.
You typically cannot remove it (required by law)
You may be able to customize the text (e.g., "Unsubscribe" vs. "Opt Out")
The unsubscribe page itself may be customizable (check SendX settings)
Best practice: Don't try to hide or remove the unsubscribe link. It's legally required and actually builds trust with subscribers.
Q: I have 5 landing pages. Do I need to set up thank-you emails 5 times?
A: Only if you want different thank you emails for each.
If all landing pages offer similar content:
Connect all landing pages to one list
Set up the thank you email once on that list
Everyone gets the same message
If you want customized thank you emails:
Create separate lists (one per landing page or content type)
Connect each landing page to its respective list
Set up a unique thank-you email for each list
Example:
Landing Page 1 (eBook) → "eBook List" → Thank you email with eBook download
Landing Page 2 (Webinar) → "Webinar List" → Thank you email with webinar access
Landing Page 3-5 (Newsletter) → "Newsletter List" → Generic welcome thank you email
Quick Reference Checklist
Setting Up Landing Page → List Connection:
[ ] Go to Forms → Landing Page
[ ] Create new or edit existing landing page
[ ] Navigate to the Success tab
[ ] Choose "Add to an Existing List" or create a new list
[ ] Select the list from the dropdown
[ ] Configure "After user has submitted form" (Do nothing or Redirect to URL)
[ ] Click Update Landing Page
[ ] Test by submitting the form yourself
[ ] Verify contact appears in the list
Setting Up Automated Thank You Email:
[ ] Go to Audience → Lists
[ ] Click on the list name
[ ] Click Edit List (yellow button)
[ ] Scroll to Thank You Email Setting
[ ] Check the box: "Send automated thank you e-mail once user has subscribed to this list"
[ ] Select Who is this from (verified sender)
[ ] Write the Subject line (use personalization if desired)
[ ] Click Edit to customize the email body
[ ] Add your logo, message, links, and CTAs
[ ] Use personalization tokens ({{.FirstName}}, etc.)
[ ] Send a test email to yourself
[ ] Check inbox and spam folder
[ ] Verify links work and content displays correctly
[ ] Click Save List
[ ] Test the full flow by submitting your landing page form
[ ] Confirm thank you email arrives within seconds
Best Practices:
[ ] Use Single Opt-In lists for landing pages (not Double Opt-In)
[ ] Do NOT enable thank you email on Double Opt-In lists
[ ] Use separate lists if you need different thank you messages
[ ] Include both the success message (on-screen) and the thank you email (inbox)
[ ] Deliver immediate value in the thank you email (download, access, resources)
[ ] Keep thank you emails short and focused
[ ] Update forms if you rename lists
[ ] Test everything before launching
Need Help?
If you're having trouble connecting landing pages to lists or setting up thank you emails, contact SendX Support for assistance with:
Landing page form configuration
Thank you email deliverability issues
List management and organization
Deciding between Single vs. Double Opt-In for your use case
Advanced automation setups for welcome sequences
Pro Tip: When setting up thank-you emails, think about the subscriber's mindset immediately after signing up. They're excited and engaged—use this opportunity to deliver value instantly, set clear expectations, and make a great first impression. A well-crafted thank-you email can be the difference between an engaged subscriber and someone who immediately forgets they signed up!