checkmail

Golang 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

Usage

1. Format

    func main() {
		err := checkmail.ValidateFormat("ç$€§/[email protected]")
		if err != nil {
			fmt.Println(err)
		}
	}

output: invalid format

2. Domain

    func main() {
		err := checkmail.ValidateHost("[email protected]")
		if err != nil {
			fmt.Println(err)
		}
	}

output: unresolvable host

3. User

    func main() {
		err := checkmail.ValidateHost("[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.