## mailfront

# Plugin: starttls-ucspi

This plugin uses ucspi-tls to implement the `STARTTLS` SMTP command, which is used to begin TLS encryption on a plaintext SMTP connection.

## Configuration

This module is configured by the following environment variable:

`UCSPITLS`
  Instructs mailfront to offer the `STARTTLS` command. This variable is removed from the environment after TLS has been negotiated.

## Commands

`STARTTLS`
  Implements the SMTP service extension for secure smtp over transport layer security, as specified by RFC 3207.

## Sender Action

None

## Recipient Action

None

## Data Action

None

## Message Action

None