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Local mailer is the zero-config development stub: it renders every email template and logs the resulting HTML, subject, and recipient to stdout — so you can verify email content without needing a SendGrid account.

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Why

The local mailer lets you develop and test all email flows — including the full template render — without a SendGrid API key or an email inbox. Every send() and queue() call runs through the same template pipeline as production, so you catch template bugs early.

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Setup

This is the default for development.ts and requires no extra dependencies or environment variables: 
mailer: {
  client: MailerClientType.LOCAL,
  from: 'dev@example.com',
}
Queued emails still go through the EMAIL queue consumer — you’ll see the rendered output in the consumer’s log stream.

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What’s next?

  • Twilio SendGrid — the production provider, including the full template list and send vs queue comparison.