Replaced gopkg.in/mail.v2 by wneessen/go-mail

go.mod

@@ -2,6 +2,6 @@ module github.com/KeepSec-Technologies/Mail2Go
 
 go 1.20
 
-require gopkg.in/mail.v2 v2.3.1
-
-require gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect
+require (
+	github.com/wneessen/go-mail v0.4.0 // indirect
+)

go.sum

@@ -1,4 +1,2 @@
-gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc h1:2gGKlE2+asNV9m7xrywl36YYNnBG5ZQ0r/BOOxqPpmk=
-gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc/go.mod h1:m7x9LTH6d71AHyAX77c9yqWCCa3UKHcVEj9y7hAtKDk=
-gopkg.in/mail.v2 v2.3.1 h1:WYFn/oANrAGP2C0dcV6/pbkPzv8yGzqTjPmTeO7qoXk=
-gopkg.in/mail.v2 v2.3.1/go.mod h1:htwXN1Qh09vZJ1NVKxQqHPBaCBbzKhp5GzuJEA4VJWw=
+github.com/wneessen/go-mail v0.4.0 h1:Oo4HLIV8My7G9JuZkoOX6eipXQD+ACvIqURYeIzUc88=
+github.com/wneessen/go-mail v0.4.0/go.mod h1:zxOlafWCP/r6FEhAaRgH4IC1vg2YXxO0Nar9u0IScZ8=

smtp.go

@@ -4,35 +4,46 @@ import (
 	"fmt"
 	"strings"
 
-	"gopkg.in/mail.v2"
+	"github.com/wneessen/go-mail"
 )
 
 // sendEmail constructs and sends an email with the specified HTML body and attachments.
 func sendEmail(smtpServer string, smtpPort int, username string, password string, from string, to []string, subject, body, bodyFile string, attachments []string) error {
-	m := mail.NewMessage()
+	// Create a new message
+	m := mail.NewMsg()
+	if err := m.From(from); err != nil {
+		return err
+	}
 
-	// Set the main email parts
-	m.SetHeader("From", from)
-	m.SetHeader("To", to...)
-	m.SetHeader("Subject", subject)
+	// Set recipient(s)
+	if err := m.To(to...); err != nil {
+		return err
+	}
 
-	// Check if the body is provided via a file
+	m.Subject(subject)
+
+	// Set the body
 	if bodyFile != "" {
-		m.SetBody("text/html", body)
+		m.SetBodyString(mail.TypeTextHTML, body)
 	} else {
-		m.SetBody("text/plain", body)
+		m.SetBodyString(mail.TypeTextPlain, body)
 	}
 
 	// Add attachments
 	for _, attachment := range attachments {
-		m.Attach(attachment)
+		m.AttachFile(attachment)
 	}
 
-	// Set up SMTP information
-	d := mail.NewDialer(smtpServer, smtpPort, username, password)
+	// Create a new client
+	c, err := mail.NewClient(smtpServer, mail.WithPort(smtpPort), mail.WithSMTPAuth(mail.SMTPAuthPlain),
+		mail.WithUsername(username), mail.WithPassword(password))
+	if err != nil {
+		return err
+	}
+	defer c.Close()
 
 	// Send the email
-	if err := d.DialAndSend(m); err != nil {
+	if err := c.DialAndSend(m); err != nil {
 		fmt.Printf("Error sending email: %v", err)
 		return err
 	}