feat: ipv6 connect

internal/pkg/core/notifier/providers/email/email.go

@@ -3,9 +3,10 @@ package email
 import (
 	"context"
 	"crypto/tls"
-	"fmt"
 	"log/slog"
+	"net"
 	"net/smtp"
+	"strconv"
 
 	"github.com/domodwyer/mailyak/v3"
 
@@ -68,12 +69,12 @@ func (n *NotifierProvider) Notify(ctx context.Context, subject string, message s
 	var smtpAddr string
 	if n.config.SmtpPort == 0 {
 		if n.config.SmtpTls {
-			smtpAddr = fmt.Sprintf("%s:465", n.config.SmtpHost)
+			smtpAddr = net.JoinHostPort(n.config.SmtpHost, "465")
 		} else {
-			smtpAddr = fmt.Sprintf("%s:25", n.config.SmtpHost)
+			smtpAddr = net.JoinHostPort(n.config.SmtpHost, "25")
 		}
 	} else {
-		smtpAddr = fmt.Sprintf("%s:%d", n.config.SmtpHost, n.config.SmtpPort)
+		smtpAddr = net.JoinHostPort(n.config.SmtpHost, strconv.Itoa(int(n.config.SmtpPort)))
 	}
 
 	var yak *mailyak.MailYak