Go Mail API

Overview

Go Mail API is a simple REST API for sending email notifications via SMTP.

Features

• Send emails using SMTP.
• Configurable SMTP settings.
• Support for environment variables and command-line flags for configuration.

Installation

Download the appropriate binary for your operating system from the GitHub Releases page.

Configuration

The Go Mail API can be configured using environment variables or command-line flags. The following options are available:

Environment Variable	Command-Line Flag	Description	Default Value
MAIL_API_PORT	--api-port	Port for the API server	8080
MAIL_SMTP_PORT	--smtp-port	Port for the SMTP server	25
MAIL_SMTP_HOST	--smtp-host	Host for the SMTP server	(required)
MAIL_SMTP_USER	--smtp-user	User for the SMTP server	(required)
MAIL_SMTP_PASS	--smtp-pass	Password for the SMTP server	(required)
MAIL_SMTP_USE_TLS	--smtp-use-tls	Use TLS for the SMTP server	false

Make sure to set the required configuration values (MAIL_SMTP_HOST, MAIL_SMTP_USER, MAIL_SMTP_PASS) either through environment variables or command-line flags.

API Documentation

Send Email

Send an email using the Go Mail API.

• URL: /send
• Method: POST

Request Body

Field	Type	Required	Description
from	string	Yes	The email address of the sender.
to	array of strings	Yes	The email addresses of the recipients.
cc	array of strings	No	The email addresses of the CC recipients.
bcc	array of strings	No	The email addresses of the BCC recipients.
subject	string	Yes	The subject of the email.
priority	string	No	The priority of the email (e.g., "high", "normal", "low").
headers	object	No	Additional headers to include in the email.
text	string	No	The plain text version of the email body.
html	string	No	The HTML version of the email body.
attachments	array of attachment objects	No	Attachments to include in the email.

Attachment Object

Field	Type	Required	Description
filename	string	Yes	The name of the attachment file.
content_type	string	Yes	The content type of the attachment.
content	string	Yes	The content of the attachment, either base64-encoded or plain text.
encoded	boolean	No	Indicates whether the content is base64-encoded. Defaults to false.

Response

Status Code	Body
200 OK	{"message": "Email sent successfully"}

Example

1. Set the required configuration values:

   export MAIL_SMTP_HOST="smtp.gmail.com"
   export MAIL_SMTP_USER="[email protected]"
   export MAIL_SMTP_PASS="your app password"

2. Start the Go Mail API server:

   ./go-mail-api --api-port=8080 --smtp-port=587 --smtp-use-tls=true

3. Send a POST request to the /send endpoint:

   curl -X POST -H "Content-Type: application/json" -d '{
     "from": "[email protected]",
     "to": ["[email protected]", "[email protected]"],
     "subject": "Test Email",
     "priority": "high",
     "html": "<p>This is a <strong>test</strong> email.</p>",
     "attachments": [
       {
         "filename": "example.txt",
         "content_type": "text/plain",
         "content": "VGhpcyBpcyBhbiBleGFtcGxlIGF0dGFjaG1lbnQu",
         "encoded": true
       }
     ]
   }' http://localhost:8080/send

Contributing

Contributions and suggestions are welcome.
Please open an issue for discussion or propose improvements directly through a pull request.

Support & Issues

For support or reporting issues, please open an issue in the GitHub repository or reach out on LinkedIn.