Deliverability

Email Humanizer for AI Agents

Automatically rewrite AI-drafted emails to sound natural. Pick a tone, and the humanizer rewrites prose before every send — preserving structure, links, and compliance text.

How it works

1

Template is rendered

Your email template is rendered with dynamic payload data as usual — variables filled, layout applied.

2

Humanizer rewrites prose

The rendered content passes through an LLM that rewrites the prose to sound natural. HTML structure, links, compliance text, and unsubscribe links are preserved.

3

Style applied

The rewrite follows the configured style — casual (conversational, warm), professional (clear, direct), or friendly (personable, upbeat).

4

Email delivered

The humanized content is sent via the provider. The original and rewritten versions are both stored for audit and comparison.

Enable per-send

POST /v1/agent/request-send with humanize: true

POST /v1/agent/request-send
{
  "tenantId": "your-tenant-id",
  "recipientEmail": "alice@example.com",
  "templateId": "onboarding-welcome",
  "dedupeKey": "onboarding-alice-step1",
  "payload": { "firstName": "Alice" },
  "humanize": true,
  "humanizeStyle": "friendly"
}

Tone styles

Casual

Conversational tone with contractions and a warm, approachable feel. Great for consumer products.

Professional

Clear, direct, and polished. The default style — suitable for B2B and enterprise communication.

Friendly

Warm, personable, and upbeat. Works well for onboarding sequences and customer success.

Before and after

Template output

Hi {{firstName}},

Welcome to Molted Email. Your account has been created
and your trial is active for 14 days.

Please complete the following steps to get started:
1. Verify your domain
2. Create your first template
3. Send a test email

Best regards,
The Molted Email Team

After humanizer (friendly)

Hey Alice,

Welcome aboard! Your account is all set and you've got
14 days to explore everything.

Here's how to get rolling:
1. Verify your domain
2. Create your first template
3. Fire off a test email

Excited to have you here — let us know if you need anything!

The Molted Email Team

Tenant-wide configuration

Enable the humanizer for all sends at the tenant level, or override per-mailbox and per-send. Settings resolve in order: per-send, then agent-level, then tenant-level, then disabled.

// Get current config
GET /v1/me/humanizer

// Enable tenant-wide
PUT /v1/me/humanizer
{
  "enabled": true,
  "style": "professional",
  "provider": "anthropic"
}

Sound human, send at scale

One flag turns templated emails into natural-sounding messages. Links, compliance text, and unsubscribe links are always preserved.

Get started free