Add smtp tls support

Signed-off-by: gearnode <bryan@frimin.fr>

pkg/mailer/mailer.go

@@ -43,6 +43,7 @@ type (
 		Timeout     time.Duration
 		User        string
 		Password    string
+		TLSRequired bool
 	}
 )
 
@@ -90,6 +91,12 @@ func (m *Mailer) sendMailWithTimeout(ctx context.Context, to []string, msg []byt
 	}
 	defer c.Quit()
 
+	if m.cfg.TLSRequired {
+		if err := c.StartTLS(nil); err != nil {
+			return fmt.Errorf("TLS negotiation error: %w", err)
+		}
+	}
+
 	if m.cfg.User != "" && m.cfg.Password != "" {
 		auth := smtp.PlainAuth("", m.cfg.User, m.cfg.Password, host)
 		if err = c.Auth(auth); err != nil {

pkg/probod/mailer_config.go

@@ -22,8 +22,9 @@ type (
 	}
 
 	smtpConfig struct {
-		Addr     string `json:"addr"`
-		User     string `json:"user"`
-		Password string `json:"password"`
+		Addr        string `json:"addr"`
+		User        string `json:"user"`
+		Password    string `json:"password"`
+		TLSRequired bool   `json:"tls-required"`
 	}
 )

pkg/probod/probod.go

@@ -222,6 +222,7 @@ func (impl *Implm) Run(
 		Addr:        impl.cfg.Mailer.SMTP.Addr,
 		User:        impl.cfg.Mailer.SMTP.User,
 		Password:    impl.cfg.Mailer.SMTP.Password,
+		TLSRequired: impl.cfg.Mailer.SMTP.TLSRequired,
 		Timeout:     time.Second * 10,
 	})
 	wg.Add(1)