emailer

Emailer

Small email service written in GO

Run on Docker

Image is already published on Docker Hub here

docker run kermeth/emailer

Roadmap

• Add testing
• Support attachments
• Support multiple target emails
• Support Gmail GCP API
• Support Microsoft Graph API
• Support Amazon SES
• Retry Mechanism
• Rate Limiting
• Read message from RabbitMQ

API Reference

Healthcheck

  GET /health

Send email

  POST /smtp/send

{
      "to": [
        "receiver@gmail.com"
      ],
      "cc": [],
      "bcc": [],
      "subject": "Test email",
      "body": "This is <b>a</b> test email",
      "attachments": [
        {
          "name": "test.txt",
          "data": "VGhpcyBpcyBhIHRlc3QgYXR0YWNobWVudA=="
        }
      ],
      "configuration": {
        "host": "smtp.gmail.com",
        "port": 587,
        "alias": "John Doe", // Optional
        "loginType": "plain|login", // Optional (default: plain)
        "from": "sender@gmail.com",
        "password": "p4$$w0rd"
      }
}

Send email via Microsoft Graph

  POST /graph/send

{
      "to": [
        "receiver@contoso.com"
      ],
      "cc": [],
      "bcc": [],
      "subject": "Test email (Graph)",
      "body": "This is <b>a</b> test email sent via Microsoft Graph",
      "attachments": [
        {
          "name": "test.txt",
          "data": "VGhpcyBpcyBhIHRlc3QgYXR0YWNobWVudA=="
        }
      ],
      "configuration": {
        "tenantId": "00000000-0000-0000-0000-000000000000",
        "appId": "11111111-1111-1111-1111-111111111111",
        "secret": "your-client-secret",
        "from": "sender@contoso.com" // UPN (email) or user id to send as
      }
}

Notes:

• Body is sent as HTML.
• The Azure AD app must have Microsoft Graph Application permission Mail.Send and admin consent granted.
• The app must be allowed to send as the specified from user/mailbox in your tenant.
• Attachments data should be the Base64 content of the file.

Deployment

To deploy this project run

  go build
  ./emailer

Changelog

• 0.1.1
  • Allow alias for sender
• 0.1.0
  • Initial Release
  • SMTP Support
  • Attachments Support