changed mailing service for smtp

docker-compose.yml

@@ -2,7 +2,7 @@ version: "3.5"
 
 services:
   database:
-    image: postgres
+    image: postgres:14.7
     restart: always
     environment:
       - POSTGRES_USER=postgres

mail/service.go

@@ -7,6 +7,7 @@ import (
 	"time"
 	"text/template" 
 	"github.com/sirupsen/logrus"
+	"crypto/tls"
 )
 
 type Mail struct {
@@ -72,16 +73,64 @@ func Service(mailQueue chan Mail) {
 	addr := fmt.Sprintf("%s:%s", host, port)
 	auth := smtp.PlainAuth("", user, pass, host)
 
+	tlsConfig := &tls.Config{
+		InsecureSkipVerify: true, // Change this to verify server certificate in production
+	}
+	conn, err := tls.Dial("tcp", addr, tlsConfig)
+	if err != nil {
+		logrus.Errorf("Error dialing SMTPS server: %v", err)
+	}
+
+	client, err := smtp.NewClient(conn, host)
+	if err != nil {
+		logrus.Errorf("Error creating SMTP client: %v", err)
+	}
+
+
+	if err := client.Auth(auth); err != nil {
+		logrus.Errorf("Error authenticating: %v", err)
+	}
+
 	for mail := range mailQueue {
 		message := mail.BuildMessage()
 		to := append(mail.To, webteam)
-		batches:= batchEmails(to, batch); 
-		for _, emailBatch:= range batches {
-			if err := smtp.SendMail(addr, auth, sender, emailBatch, message); err != nil {
-				logrus.Errorf("Error sending mail: %v", emailBatch)
-				logrus.Errorf("Error: %v", err)
+		batches := batchEmails(to, batch)
+		for _, emailBatch := range batches {
+
+			// if err := client.StartTLS(tlsConfig); err != nil {
+			// 	logrus.Errorf("Error starting TLS: %v", err)
+			// 	continue
+			// }
+			if err := client.Mail(sender); err != nil {
+				logrus.Errorf("Error setting sender: %v", err)
+			}
+
+			for _, recipient := range emailBatch {
+				if err := client.Rcpt(recipient); err != nil {
+					logrus.Errorf("Error setting recipient %s: %v", recipient, err)
+					continue
+				}
+			}
+
+			// Send the email body
+			w, err := client.Data()
+			if err != nil {
+				logrus.Errorf("Error creating data writer: %v", err)
+				continue
+			}
+			_, err = w.Write(message)
+			if err != nil {
+				logrus.Errorf("Error writing email body: %v", err)
+			}
+			err = w.Close()
+			if err != nil {
+				logrus.Errorf("Error closing data writer: %v", err)
 			}
 			time.Sleep(1 * time.Second)
 		}
 	}
-}
+
+	if err := client.Quit(); err != nil {
+		logrus.Errorf("Error closing connection: %v", err)
+	}
+}