diff --git a/BTCPayServer/Controllers/UIStoresController.Email.cs b/BTCPayServer/Controllers/UIStoresController.Email.cs
index 072b97cf1..b7f7e65c6 100644
--- a/BTCPayServer/Controllers/UIStoresController.Email.cs
+++ b/BTCPayServer/Controllers/UIStoresController.Email.cs
@@ -62,6 +62,14 @@ namespace BTCPayServer.Controllers
 
                 return View(vm);
             }
+
+            for (var i = 0; index < vm.Rules.Count; index++)
+            {
+                var rule = vm.Rules[i];
+                if (!rule.CustomerEmail && string.IsNullOrEmpty(rule.To))
+                    ModelState.AddModelError($"{nameof(vm.Rules)}[{i}].{nameof(rule.To)}", "Either recipient or \"Send the email to the buyer\" is required");
+            }
+            
             if (!ModelState.IsValid)
             {
                 return View(vm);
@@ -121,7 +129,6 @@ namespace BTCPayServer.Controllers
             
             public bool CustomerEmail { get; set; }
             
-            [Required]
             [MailboxAddress]
             public string To { get; set; }
             
diff --git a/BTCPayServer/Views/UIStores/StoreEmails.cshtml b/BTCPayServer/Views/UIStores/StoreEmails.cshtml
index 928baadc6..b21452f75 100644
--- a/BTCPayServer/Views/UIStores/StoreEmails.cshtml
+++ b/BTCPayServer/Views/UIStores/StoreEmails.cshtml
@@ -60,7 +60,7 @@
                             <div class="form-text">Choose what event sends the email.</div>
                         </div>
                         <div class="form-group">
-                            <label asp-for="Rules[index].To" class="form-label" data-required>Recipients</label>
+                            <label asp-for="Rules[index].To" class="form-label">Recipients</label>
                             <input type="text" asp-for="Rules[index].To" class="form-control email-rule-to" />
                             <span asp-validation-for="Rules[index].To" class="text-danger"></span>
                             <div class="form-text">Who to send the email to. For multiple emails, separate with a comma.</div>