diff --git a/cmd/verstak-server/server.go b/cmd/verstak-server/server.go
index 4980059..f4b76b3 100644
--- a/cmd/verstak-server/server.go
+++ b/cmd/verstak-server/server.go
@@ -1486,9 +1486,10 @@ function closeHealth(e){if(!e||e.target.id==='health-modal')document.getElementB
 function testSMTP(){
   var f=document.querySelector('#smtp-modal form')
   var fd=new FormData(f)
+  var obj={};for(var e of fd.entries()){obj[e[0]]=e[1]}
   var r=document.getElementById('smtp-test-result')
   r.textContent='⏳ Тестируем...';r.style.color='#888'
-  fetch('/admin/api/smtp/test',{method:'POST',body:fd}).then(function(r2){return r2.json()}).then(function(d){
+  fetch('/admin/api/smtp/test',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify(obj)}).then(function(r2){return r2.json()}).then(function(d){
     r.textContent=d.ok?'✓ Тест пройден':'✗ '+d.error
     r.style.color=d.ok?'#4ade80':'#ff6b6b'
   }).catch(function(e){r.textContent='✗ '+e;r.style.color='#ff6b6b'})
@@ -1546,16 +1547,24 @@ func (s *Server) handleAdminSMTPTest(w http.ResponseWriter, r *http.Request) {
 	if !s.requireAdmin(w, r) {
 		return
 	}
-	if err := r.ParseForm(); err != nil {
-		jsonErr(w, 400, "bad form")
+	var req struct {
+		Host string `json:"smtp_host"`
+		Port string `json:"smtp_port"`
+		User string `json:"smtp_user"`
+		Pass string `json:"smtp_pass"`
+		From string `json:"smtp_from"`
+		To   string `json:"test_to"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		jsonErr(w, 400, "bad json")
 		return
 	}
-	host := r.FormValue("smtp_host")
-	port := r.FormValue("smtp_port")
-	user := r.FormValue("smtp_user")
-	pass := r.FormValue("smtp_pass")
-	from := r.FormValue("smtp_from")
-	to := r.FormValue("test_to")
+	host := req.Host
+	port := req.Port
+	user := req.User
+	pass := req.Pass
+	from := req.From
+	to := req.To
 	if to == "" {
 		to = from
 	}