initial

go.mod

@@ -0,0 +1,5 @@
+module git.icod.de/essentials/mailer
+
+go 1.13
+
+require github.com/go-mail/mail v2.3.1+incompatible

go.sum

@@ -0,0 +1,2 @@
+github.com/go-mail/mail v2.3.1+incompatible h1:UzNOn0k5lpfVtO31cK3hn6I4VEVGhe3lX8AJBAxXExM=
+github.com/go-mail/mail v2.3.1+incompatible/go.mod h1:VPWjmmNyRsWXQZHVHT3g0YbIINUkSmuKOiLIDkWbL6M=

mailer.go

@@ -0,0 +1,38 @@
+package mailer
+
+import (
+	"crypto/tls"
+
+	"github.com/go-mail/mail"
+)
+
+type Options struct {
+	From     string
+	Host     string
+	Port     int
+	Username string
+	Password string
+}
+
+type Mailer struct {
+	dialer  *mail.Dialer
+	options *Options
+}
+
+func New(options *Options) *Mailer {
+	dialer := mail.NewDialer(options.Host, options.Port, options.Username, options.Password)
+	dialer.TLSConfig = &tls.Config{InsecureSkipVerify: true}
+	return &Mailer{
+		dialer:  dialer,
+		options: options,
+	}
+}
+
+func (mailer *Mailer) Send(to, subject, text string) error {
+	m := mail.NewMessage()
+	m.SetHeader("From", mailer.options.From)
+	m.SetHeader("To", to)
+	m.SetHeader("Subject", subject)
+	m.SetBody("text/plain", text)
+	return mailer.dialer.DialAndSend(m)
+}