Can send mail through a smtp relay

main.go

@@ -18,9 +18,10 @@ import (
 )
 
 var myLDAP = LDAP{
-	Host:   "localhost",
-	Port:   389,
-	BaseDN: "dc=example,dc=com",
+	Host:     "localhost",
+	Port:     389,
+	BaseDN:   "dc=example,dc=com",
+	MailPort: 587,
 }
 
 type ResponseWriterPrefix struct {
@@ -125,6 +126,23 @@ func main() {
 		myLDAP.ServicePassword = val
 	}
 
+	if val, ok := os.LookupEnv("SMTP_HOST"); ok {
+		myLDAP.MailHost = val
+	}
+	if val, ok := os.LookupEnv("SMTP_PORT"); ok {
+		if port, err := strconv.Atoi(val); err == nil {
+			myLDAP.MailPort = port
+		} else {
+			log.Println("Invalid value for SMTP_PORT:", val)
+		}
+	}
+	if val, ok := os.LookupEnv("SMTP_USER"); ok {
+		myLDAP.MailUser = val
+	}
+	if val, ok := os.LookupEnv("SMTP_PASSWORD"); ok {
+		myLDAP.MailPassword = val
+	}
+
 	// Prepare graceful shutdown
 	interrupt := make(chan os.Signal, 1)
 	signal.Notify(interrupt, os.Interrupt, syscall.SIGTERM)