diff --git a/resources/views/welcome.blade.php b/resources/views/welcome.blade.php
index 7530054..e313d0d 100644
--- a/resources/views/welcome.blade.php
+++ b/resources/views/welcome.blade.php
@@ -372,6 +372,18 @@ function fetchMail() {
                 });
             }, 1000 * 60);
 
+            $('#myModal').on('shown.bs.modal', function () {
+                let iframeHeight = $('#modalIframe').contents().find("html").height();
+                console.log("Iframe的实际高度是: " + iframeHeight + "px");
+                if (iframeHeight <= 600){
+                    $('#modalIframe').css('height',600);
+                } else if (iframeHeight >= 800){
+                    $('#modalIframe').css('height',800);
+                } else {
+                    $('#modalIframe').css('height',iframeHeight);
+                }
+            });
+
             $(document).on('click', '.info-btn', function () {
                 let key = $(this).data('key');
                 let apiUrl = '/mail/' + key;
@@ -395,13 +407,7 @@ function fetchMail() {
                             $('#exampleModalLabel').text(text);
                             // 显示模态框
                             $('#myModal').modal('show');
-                            let iframeHeight = $('#modalIframe').contents().find("html").height();
-                            console.log("Iframe的实际高度是: " + iframeHeight + "px");
-                            if (iframeHeight >= 600){
-                                $('#modalIframe').css('height',600);
-                            } else {
-                                $('#modalIframe').css('height',iframeHeight);
-                            }
+
 
 
                         } catch (e) {