chore(mail): set mail server hostname

pkg/helper/hostname.go

@@ -0,0 +1,25 @@
+package helper
+
+import (
+	"os"
+	"strings"
+)
+
+// GetHostname returns hostname
+func GetHostname() string {
+	hostname, _ := os.Hostname()
+	if hostname == "" {
+		hostname = "localhost"
+	}
+	return hostname
+}
+
+// GetMailHostname return mail hostname
+func GetMailHostname() string {
+	hostname := GetHostname()
+	// ugly convention used in order to avoid another config params
+	if strings.HasPrefix(hostname, "api.") {
+		hostname = strings.Replace(hostname, "api", "my", 1)
+	}
+	return hostname
+}

pkg/server/smtp.go

@@ -6,6 +6,7 @@ import (
 	"github.com/emersion/go-smtp"
 	"github.com/ncarlier/readflow/pkg/config"
 	"github.com/ncarlier/readflow/pkg/constant"
+	"github.com/ncarlier/readflow/pkg/helper"
 	"github.com/ncarlier/readflow/pkg/mail"
 	"github.com/rs/zerolog"
 	"github.com/rs/zerolog/log"
@@ -41,8 +42,7 @@ func NewSMTPHTTPServer(cfg *config.Config) *SMTPServer {
 	s := smtp.NewServer(backend)
 
 	s.Addr = addr
-	// TODO customize the domain ?
-	s.Domain = "localhost"
+	s.Domain = helper.GetMailHostname()
 	s.ReadTimeout = constant.DefaultTimeout
 	s.WriteTimeout = constant.DefaultTimeout
 	s.MaxMessageBytes = 1024 * 1024