From a16aa6f73f57eb3de57ca3a5b10b747158d43df9 Mon Sep 17 00:00:00 2001
From: AJ ONeal <aj@therootcompany.com>
Date: Mon, 20 Apr 2026 22:38:49 -0600
Subject: [PATCH] fix(formmailer): set tls.Config.ServerName on StartTLS

---
 net/formmailer/formmailer.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/formmailer/formmailer.go b/net/formmailer/formmailer.go
index f610046..fefb341 100644
--- a/net/formmailer/formmailer.go
+++ b/net/formmailer/formmailer.go
@@ -36,6 +36,7 @@ package formmailer
 import (
 	"bytes"
 	"context"
+	"crypto/tls"
 	"errors"
 	"fmt"
 	"log"
@@ -384,7 +385,7 @@ func (fm *FormMailer) sendMail(ctx context.Context, msg []byte) error {
 	defer func() { _ = c.Close() }()
 
 	if ok, _ := c.Extension("STARTTLS"); ok {
-		if err := c.StartTLS(nil); err != nil {
+		if err := c.StartTLS(&tls.Config{ServerName: hostname}); err != nil {
 			return fmt.Errorf("starttls: %w", err)
 		}
 	}