https://github.com/knadh/smtppool

High throughput Go SMTP pool library with graceful handling of idle timeouts, errors, and retries.
https://github.com/knadh/smtppool

email-client email-sender pool smtp smtp-client

Last synced: about 1 year ago
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High throughput Go SMTP pool library with graceful handling of idle timeouts, errors, and retries.

• Host: GitHub
• URL: https://github.com/knadh/smtppool
• Owner: knadh
• License: mit
• Created: 2020-05-10T18:04:13.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2025-03-29T11:27:28.000Z (about 1 year ago)
• Last Synced: 2025-04-08T10:34:23.947Z (about 1 year ago)
• Topics: email-client, email-sender, pool, smtp, smtp-client
• Language: Go
• Homepage:
• Size: 55.7 KB
• Stars: 153
• Watchers: 3
• Forks: 32
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          


smtppool

========

smtppool is a Go library that creates a pool of reusable SMTP connections for high throughput e-mailing. It gracefully handles idle connections, timeouts, and retries. The e-mail formatting, parsing, and preparation code is forked from [jordan-wright/email](https://github.com/jordan-wright/email).

### Install

```go get github.com/knadh/smtppool/v2```

#### Usage

```go

package main

import (

	"log"

	"time"

	"github.com/knadh/smtppool/v2"

)

func main() {

	// Try https://github.com/mailhog/MailHog for running a local dummy SMTP server.

	// Create a new pool.

	pool, err := smtppool.New(smtppool.Opt{

		Host:            "localhost",

		Port:            1025,

		MaxConns:        10,

		IdleTimeout:     time.Second * 10,

		PoolWaitTimeout: time.Second * 3,

		SSL:             smtppool.SSLNone

	})

	if err != nil {

		log.Fatalf("error creating pool: %v", err)

	}

	e:= smtppool.Email{

		From:    "John Doe ",

		To:      []string{"doe@example.com"},

		// Optional.

		Bcc:     []string{"doebcc@example.com"},

		Cc:      []string{"doecc@example.com"},

		Subject: "Hello, World",

		Text:    []byte("This is a test e-mail"),

		HTML:    []byte("This is a test e-mail"),

	}

	// Add attachments.

	if _, err := e.AttachFile("test.txt"); err != nil {

		log.Fatalf("error attaching file: %v", err)

	}

	if err := pool.Send(e); err != nil {

		log.Fatalf("error sending e-mail: %v", err)

	}

}

```

Licensed under the MIT license.