Email sending in Go: a library for working with email in Golang

The Email sending in Go library is a powerful and convenient tool for sending emails from applications written in Go (Golang). It provides a simple interface for creating and sending email messages via an SMTP server, supports HTML format, attachments, multiple recipients, and header customization. This is an ideal solution for developers who want to integrate email sending functionality into their web services, backend systems, or utilities.

Why is this library needed?

In modern development, sending email is a standard task: registration notifications, password resets, newsletters, order confirmations. Go provides the built-in net/smtp package, but it is low-level and requires manual construction of MIME messages. Our library automates this process, making the code clean and maintainable. It is especially useful when creating microservices where speed and reliability are important.

Installation

Installation is standard via Go Modules:

go get github.com/your-username/email-send-go

After that, import the library into your project:

import "github.com/your-username/email-send-go"

Main features

• SMTP sending: support for TLS and SSL, authentication via login/password.
• HTML and text: ability to send both plain-text and HTML emails.
• Attachments: adding files (images, PDFs, documents).
• Multiple recipients: To, Cc, Bcc.
• Customizable headers: Reply-To, Priority, Message-ID.
• Flexible configuration: support for environment variables for SMTP settings.

Code example in Go (Golang)

package main

import (    "fmt"    "github.com/your-username/email-send-go")

func main() {    // SMTP server configuration    config := email.Config{        Host:     "smtp.gmail.com",        Port:     587,        Username: "your-email@gmail.com",        Password: "your-app-password",        From:     "your-email@gmail.com",    }

    // Creating the email    msg := email.NewMessage()    msg.SetTo([]string{"recipient@example.com"})    msg.SetSubject("Hello from Go!")    msg.SetBody("This is a test email sent using Go.")

    // Adding an attachment    msg.Attach("document.pdf")

    // Sending    err := email.Send(config, msg)    if err != nil {        fmt.Println("Error:", err)    } else {        fmt.Println("Email sent successfully!")    }}

When to use

The library is suitable for any Go project that requires email sending: from simple scripts to high-load web services. It is especially effective when working with task queues (e.g., via RabbitMQ or Redis) for asynchronous sending. It also integrates perfectly into CI/CD pipelines for build notifications.

Start using Email sending in Go today — save time and make your code more professional!