Not possible to configure timeouts with this library

[codestation]

If the SMTP server isn't available then isn't possible to close the pool connections because it hangs indefinitely on net.Dial

package main

import (
        "fmt"
        "net/smtp"
        "time"

        "github.com/jordan-wright/email"
)

func main() {
        e := email.NewEmail()
        e.From = "Jordan Wright <[email protected]>"
        e.To = []string{"[email protected]"}
        e.Bcc = []string{"[email protected]"}
        e.Cc = []string{"[email protected]"}
        e.Subject = "Awesome Subject"
        e.Text = []byte("Text Body is, of course, supported!")
        e.HTML = []byte("<h1>Fancy HTML is supported, too!</h1>")

        p, err := email.NewPool("smtp.gmail.com:65535", 1, smtp.PlainAuth("", "[email protected]", "password123", "smtp.gmail.com"))
        if err != nil {
                panic(err)
        }
        err = p.Send(e, 1*time.Second)
        if err != nil {
                fmt.Println(err)
        }
        // hangs here because it never opened the connection
        p.Close()
}

For example the above code never exits because it uses a port where the server isn't listening.

IMO, a custom Dialer should be accepted so one can configure various timeouts to prevent this scenario.

[xhit]

The package go-simple-mail https://github.com/xhit/go-simple-mail resolves this issue.

Feel free to adapt the method used in go-simple-mail for connection timeout and send timeout for this package.