Lumail.io offers powerful features to help you build better email campaigns and track your marketing performance.

## Key Features

### [Affiliate Program](/docs/features/affiliate-program)

Create a personal referral link, turn Lumail email badges into affiliate links, and track €50 Premium rewards after two months plus immediate €200 Business rewards.

### [Enable Double Opt-In](/docs/tutorials/enable-double-opt-in)

Require new subscribers to confirm their email before campaigns. Native confirmation from Settings → Configuration.

### [Language](/docs/features/language)

Switch unsubscribe, confirmation, and survey pages to French, Spanish, or German. Email footer copy and the Unsubscribe link are edited in the campaign or a snippet — they are not auto-translated.

### [Variables](/docs/features/variables)

Personalize your emails with dynamic variables like `{{name}}`. Add default values with `{{name | 'Hey'}}` for subscribers without data.

### [Tag Action Links](/docs/features/tag-action-links)

Let subscribers add or remove tags with one click in non-transactional emails. Use them for interest capture, topic opt-outs, preference centers, and workflow triggers.

### [Surveys](/docs/survey)

Ask a one-question poll inside the email. Recipients click an answer — buttons, yes/no, emoji, or NPS — and the result lands on the campaign.

### [Content Deliverability Checker](/docs/features/content-deliverability)

Real-time email analysis that checks 9 deliverability factors as you write - spam words, links, subject length, and more. Includes AI-powered "Unspam" to automatically fix issues.

### [Deliverability Score](/docs/features/deliverability-score)

Monitor your sender reputation with post-send metrics. Track bounce rates, spam complaints, and overall deliverability health.

### [Engagement Score](/docs/features/engagement-score)

Measure campaign performance with open and click rate analysis. Understand how your audience interacts with your emails.

### [Subscriber Events](/docs/features/subscriber-events)

Track user activity and behavior to create targeted campaigns. Monitor opens, clicks, and custom events.

### [Revenue Tracking](/docs/features/revenue-tracking)

Connect purchases to email campaigns and measure your email marketing ROI with detailed revenue analytics.

### [Email Sending Queue](/docs/features/email-sending-queue)

Understand how campaigns and workflow emails share your organization's sending queue, how priority lanes work, and how capacity is split between plans.

### [Workflows](/docs/workflows)

Automate your email sequences with powerful workflow builders. Create drip campaigns and behavioral triggers.

### [V0 Capture Page](/docs/tutorials/v0-capture-page)

Build beautiful landing pages to capture subscribers with our drag-and-drop page builder.

## Getting Started

Explore each feature in detail to learn how to maximize your email marketing results with Lumail.io.