https://github.com/badoux/checkmail

Golang package for email validation
https://github.com/badoux/checkmail

format go golang host mail mailbox user validation

Last synced: 24 days ago
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Golang package for email validation

• Host: GitHub
• URL: https://github.com/badoux/checkmail
• Owner: badoux
• License: mit
• Created: 2017-01-26T09:02:00.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2024-01-15T14:53:04.000Z (11 months ago)
• Last Synced: 2024-02-14T21:35:57.824Z (10 months ago)
• Topics: format, go, golang, host, mail, mailbox, user, validation
• Language: Go
• Homepage:
• Size: 26.4 KB
• Stars: 680
• Watchers: 11
• Forks: 90
• Open Issues: 9
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-discoveries - checkmail - email validator _(`Go`)_ (DevOps Utilities)

README

        
# checkmail

[Golang](http://golang.org/) package for email validation.

 - Format (simple regexp, see: https://www.w3.org/TR/html5/forms.html#valid-e-mail-address and https://davidcel.is/posts/stop-validating-email-addresses-with-regex/)

 - Valid domain

 - Valid user: verify if the user and mailbox really exist

[![GoDoc](https://godoc.org/github.com/badoux/checkmail?status.png)](https://godoc.org/github.com/badoux/checkmail)

## Usage

Install the Checkmail package 

```

go get github.com/badoux/checkmail

```    

### 1. Format

```go

func main() {

    err := checkmail.ValidateFormat("ç$€§/[email protected]")

    if err != nil {

        fmt.Println(err)

    }

}

```

output: `invalid format`

### 2. Domain

```go

func main() {

    err := checkmail.ValidateHost("[email protected]")

    if err != nil {

        fmt.Println(err)

    }

}

```

output: `unresolvable host`

### 3. Host and User

If host is valid, requires valid SMTP `serverHostName` (see to [online validator](https://mxtoolbox.com/SuperTool.aspx)) and `serverMailAddress` to reverse validation 

for prevent SPAN and BOTS.

```go

func main() {

    var (

        serverHostName    = "smtp.myserver.com" // set your SMTP server here

        serverMailAddress = "[email protected]"  // set your valid mail address here

    )

    err := checkmail.ValidateHostAndUser(serverHostName, serverMailAddress, "[email protected]")

    if smtpErr, ok := err.(checkmail.SmtpError); ok && err != nil {

        fmt.Printf("Code: %s, Msg: %s", smtpErr.Code(), smtpErr)

    }

}

```

output: `Code: 550, Msg: 550 5.1.1 The email account that you tried to reach does not exist.`

## License

Checkmail is licensed under the [MIT License](./LICENSE).