feat: harden SMTP transport

Add explicit TLS modes, context-aware delivery, and typed transport errors. Preserve raw MIME messages and cover the new delivery paths with local SMTP tests.
2026-08-18 18:16:22 -06:00
parent 537fbeebd9
commit b3c22c261e
12 changed files with 1560 additions and 652 deletions
@@ -2,21 +2,30 @@ package main

 import (
 	"bytes"
+	"context"
+	"log"
 	"net/smtp"
+	"time"

-	"gitea.urkob.com/urko/emailsender/pkg/email"
+	"gitea.wittrail.com/urko/emailsender/pkg/email"
 )

 func main() {
-	// Here fill with real data
-	emailService := email.NewInsecure(email.SecureConfig{
-		Auth: smtp.PlainAuth("", "your@email.com", "your-password", "smtp.youremail.com"),
-		Host: "smtp.youremail.com",
-		Port: "587",
-		From: "your@email.com",
+	emailService, err := email.New(email.Config{
+		Auth:             smtp.PlainAuth("", "your@email.com", "your-password", "smtp.youremail.com"),
+		Host:             "smtp.youremail.com",
+		Port:             "587",
+		From:             "your@email.com",
+		TLSMode:          email.TLSModeSTARTTLS,
+		ConnectTimeout:   10 * time.Second,
+		OperationTimeout: 30 * time.Second,
 	})
+	if err != nil {
+		log.Fatal(err)
+	}

-	emailService.SendEmail(email.MessageWithAttachments{
+	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
+	err = emailService.SendEmailContext(ctx, email.MessageWithAttachments{
 		To:      "other@email.com",
 		Subject: "Test Email",
 		Body:    "<html><body><p>Here your body, you can attach as html<p/></body></html>",
@@ -27,4 +36,8 @@ func main() {
 			},
 		},
 	})
+	cancel()
+	if err != nil {
+		log.Fatal(err)
+	}
 }