Elite Form Backend Infrastructure for Developers

Give every website form a backend in one line.

MailRelay is a custom SendGrid-powered gateway. Capture submissions, track delivery, trigger automated templates, and dispatch signed webhooks instantly—zero complex backend controllers required.

100%

SendGrid Inboxes Delivery

< 100ms

Outbound Webhooks Delivery

Honeypot

Auto Spam Protection
contact-form.html
<!-- Copy and paste this single line as your action -->
<form action="https://sendgrid.odextra.com/f/sec_token_32" method="POST">
  
  <!-- Hidden honeypot catches 99% of spam bots -->
  <input type="text" name="_honeypot" style="display:none">

  <label>Client Email</label>
  <input type="email" name="email" required>

  <label>Query Details</label>
  <textarea name="message"></textarea>

  <button type="submit">Send Message</button>
</form>
Interactive Demonstration

Try It Live: Fill, Submit & Watch the Flow

Experience the magic yourself. Fill out this mock HTML form. Hit submit to watch the secure payload travel via API and update the visual workspace logs instantaneously.

Mock Form Embed Preview
REST API POST
100ms Delivery
Live Workspace Inbox
Connected
New Submission 3 mins ago
John Doe (john@gmail.com)

Budget: $1,500 | Interested in the Pro Plan.

Features Suite

Designed for enterprise-grade control

MailRelay equips you with absolute data clarity, smart bot-fighting locks, custom automation rules, and BYO API key layers.

Unified Workspace Inbox

Explore dynamic EAV form fields inside an optimized dashboard. Filter records, update action status tags (Open, Waiting, Resolved), and export cleanly in CSV.

Smart Anti-Spam Shield

Tackle spambots silently. Integrates hidden HTML honeypots that log bot inputs as spam while returning fake success statuses to bypass validation scans.

Workflow Automations Builder

Construct rules matching submission values (e.g. Project Budget > $5,000) to instantly route notifications, append CRM tags, or alert your account executives.

Instant Outbound Webhooks

Forward leads to Slack, Zapier, or private servers inside 100ms. Payloads are signed with standard cryptographically secure HMAC-SHA256 headers.

SendGrid SMTP Delivery Logs

Audit complete transactional events with real-time SendGrid hooks. Renders full logs indicating exact Delivered, Opened, and Clicked activity timelines.

Bring Your Own Key (BYO)

Choose between our high-delivery platform SMTP key or inputting your own company's SendGrid API key, fully encrypted inside database records.

Subscriptions Plans

Transparent, scale-friendly pricing

Start capturing leads in seconds under our Free tier, or upgrade to unleash custom domains, automations, and outbound APIs.

Free

Great for side projects and prototypes.

$0 /mo

  • 1 Forms Endpoints
  • 50 Submissions /mo
  • 100 Sent Emails /mo
  • Automations Rules
  • Signed Webhooks
  • Custom Senders
Create Free Account

Starter

Great for side projects and prototypes.

$9 /mo

  • 3 Forms Endpoints
  • 500 Submissions /mo
  • 2,500 Sent Emails /mo
  • Automations Rules
  • Signed Webhooks
  • Custom Senders
Get Started Now

Business

Great for side projects and prototypes.

$29 /mo

  • 10 Forms Endpoints
  • 5,000 Submissions /mo
  • 10,000 Sent Emails /mo
  • Advanced Automations Rules
  • SHA256 Signed Webhooks
  • Custom Senders
Get Started Now
Recommended

Pro

Perfect for growing SaaS teams.

$79 /mo

  • 50 Forms Endpoints
  • 25,000 Submissions /mo
  • 50,000 Sent Emails /mo
  • Advanced Automations Rules
  • SHA256 Signed Webhooks
  • DKIM Custom Senders
Get Started Now

Agency

Great for side projects and prototypes.

$199 /mo

  • 250 Forms Endpoints
  • 100,000 Submissions /mo
  • 250,000 Sent Emails /mo
  • Advanced Automations Rules
  • SHA256 Signed Webhooks
  • DKIM Custom Senders
Get Started Now

Enterprise

For high-volume companies & agency networks.

$499 /mo

  • Unlimited Forms Endpoints
  • 999,999 Submissions /mo
  • 999,999 Sent Emails /mo
  • Advanced Automations Rules
  • SHA256 Signed Webhooks
  • DKIM Custom Senders
  • BYO SendGrid API Keys
  • Super Admin Audit Logging
Get Started Now
Have Questions?

Frequently Asked Questions

Get direct, transparent answers regarding SendGrid routing modes, API keys encryption, spam safeguards, and monthly account quotas.

When you create a Form inside your dashboard, MailRelay generates a unique secure token (e.g. `/f/abc123`). Just copy this URL and paste it directly into your HTML <form action="YOUR_ENDPOINT" method="POST"> attribute. The platform captures all fields submitted dynamically, logs them in your CRM, and dispatches them via SMTP immediately.

Yes! Under the Enterprise tier plan, you can easily go to your Workspace Settings and switch SendGrid Mode to "BYO" (Bring Your Own Key). Simply input your own SendGrid API Key. Your key is stored fully encrypted inside our system and used directly for all transactional emails generated by your workspaces.

A honeypot is a hidden form field (configured to be invisible to actual visitors, e.g. style="display:none"). Automated spam bots automatically fill in all available input fields in a form during validation scans. When MailRelay detects that this hidden honeypot has been populated, it flags the submission as Spam instantly, preventing any outbound email alerts while returning a fake 200 OK success screen to bypass further scan attempts.

Absolutely. Every outbound webhook dispatch includes a special cryptographic verification header: X-MailRelay-Signature. This header contains an HMAC-SHA256 signature computed using your webhook's unique secret signing token and the raw request body payload, enabling your destination web servers to verify the authenticity of the payload.

Build on a foundation you can depend on.

Start capturing submissions today with our premium enterprise features.