diff --git a/resources/l10n/Localizable.strings b/resources/l10n/Localizable.strings
index cc0858c1..412c8c82 100644
--- a/resources/l10n/Localizable.strings
+++ b/resources/l10n/Localizable.strings
@@ -31,6 +31,9 @@
 /* No comment provided by engineer. */
 "Appearance" = "Appearance";
 
+/* No comment provided by engineer. */
+"Are you sure you don’t want a response?" = "Are you sure you don’t want a response?";
+
 /* No comment provided by engineer. */
 "Arrow keys" = "Arrow keys";
 
@@ -59,7 +62,7 @@
 "Close window" = "Close window";
 
 /* No comment provided by engineer. */
-"Don't check for updates periodically" = "Don't check for updates periodically";
+"Don’t check for updates periodically" = "Don’t check for updates periodically";
 
 /* No comment provided by engineer. */
 "General" = "General";
@@ -139,6 +142,9 @@
 /* No comment provided by engineer. */
 "Send" = "Send";
 
+/* No comment provided by engineer. */
+"Send anyway" = "Send anyway";
+
 /* No comment provided by engineer. */
 "Send debug profile (CPU, memory, etc)" = "Send debug profile (CPU, memory, etc)";
 
@@ -190,6 +196,9 @@
 /* No comment provided by engineer. */
 "Window title font size:" = "Window title font size:";
 
+/* No comment provided by engineer. */
+"You didn’t write your email, thus can’t receive any response." = "You didn’t write your email, thus can’t receive any response.";
+
 /* No comment provided by engineer. */
 "❖ Windows 10" = "❖ Windows 10";
 
diff --git a/resources/l10n/de.lproj/Localizable.strings b/resources/l10n/de.lproj/Localizable.strings
index 0e83251b..6668387b 100644
--- a/resources/l10n/de.lproj/Localizable.strings
+++ b/resources/l10n/de.lproj/Localizable.strings
@@ -63,7 +63,7 @@
 "Close window" = "Fenster schließen";
 
 /*No comment provided by engineer.*/
-"Don't check for updates periodically" = "Nicht regelmäßig nach Updates suchen";
+"Don’t check for updates periodically" = "Nicht regelmäßig nach Updates suchen";
 
 /*No comment provided by engineer.*/
 "General" = "Allgemein";
diff --git a/resources/l10n/en.lproj/Localizable.strings b/resources/l10n/en.lproj/Localizable.strings
index c72648d4..2b561e79 100644
--- a/resources/l10n/en.lproj/Localizable.strings
+++ b/resources/l10n/en.lproj/Localizable.strings
@@ -63,7 +63,7 @@
 "Close window" = "Close window";
 
 /*No comment provided by engineer.*/
-"Don't check for updates periodically" = "Don’t check for updates periodically";
+"Don’t check for updates periodically" = "Don’t check for updates periodically";
 
 /*No comment provided by engineer.*/
 "General" = "General";
diff --git a/resources/l10n/es.lproj/Localizable.strings b/resources/l10n/es.lproj/Localizable.strings
index 33be3ef1..4e1f82bc 100644
--- a/resources/l10n/es.lproj/Localizable.strings
+++ b/resources/l10n/es.lproj/Localizable.strings
@@ -63,7 +63,7 @@
 "Close window" = "Cerrar ventana";
 
 /*No comment provided by engineer.*/
-"Don't check for updates periodically" = "No comprobar actualizaciones periódicamente";
+"Don’t check for updates periodically" = "No comprobar actualizaciones periódicamente";
 
 /*No comment provided by engineer.*/
 "General" = "General";
diff --git a/resources/l10n/fi.lproj/Localizable.strings b/resources/l10n/fi.lproj/Localizable.strings
index 29338a84..add8b600 100644
--- a/resources/l10n/fi.lproj/Localizable.strings
+++ b/resources/l10n/fi.lproj/Localizable.strings
@@ -63,7 +63,7 @@
 "Close window" = "Sulje ikkuna";
 
 /*No comment provided by engineer.*/
-"Don't check for updates periodically" = "Älä tarkista päivityksiä";
+"Don’t check for updates periodically" = "Älä tarkista päivityksiä";
 
 /*No comment provided by engineer.*/
 "General" = "Yleinen";
diff --git a/resources/l10n/fr.lproj/Localizable.strings b/resources/l10n/fr.lproj/Localizable.strings
index 36b371e6..0d74120c 100644
--- a/resources/l10n/fr.lproj/Localizable.strings
+++ b/resources/l10n/fr.lproj/Localizable.strings
@@ -63,7 +63,7 @@
 "Close window" = "Fermer la fenêtre";
 
 /*No comment provided by engineer.*/
-"Don't check for updates periodically" = "Ne pas chercher de mise-à-jour périodiquement";
+"Don’t check for updates periodically" = "Ne pas chercher de mise-à-jour périodiquement";
 
 /*No comment provided by engineer.*/
 "General" = "Général";
diff --git a/resources/l10n/hu.lproj/Localizable.strings b/resources/l10n/hu.lproj/Localizable.strings
index 122c3435..5f12b991 100644
--- a/resources/l10n/hu.lproj/Localizable.strings
+++ b/resources/l10n/hu.lproj/Localizable.strings
@@ -63,7 +63,7 @@
 "Close window" = "Ablak bezárása";
 
 /*No comment provided by engineer.*/
-"Don't check for updates periodically" = "Ne keressen frissítéseket automatikusan";
+"Don’t check for updates periodically" = "Ne keressen frissítéseket automatikusan";
 
 /*No comment provided by engineer.*/
 "General" = "Általános";
diff --git a/resources/l10n/it.lproj/Localizable.strings b/resources/l10n/it.lproj/Localizable.strings
index 0cc5a03b..20008fd6 100644
--- a/resources/l10n/it.lproj/Localizable.strings
+++ b/resources/l10n/it.lproj/Localizable.strings
@@ -63,7 +63,7 @@
 "Close window" = "Chiudi la finestra";
 
 /*No comment provided by engineer.*/
-"Don't check for updates periodically" = "Non controllare gli aggiornamenti periodicamente";
+"Don’t check for updates periodically" = "Non controllare gli aggiornamenti periodicamente";
 
 /*No comment provided by engineer.*/
 "General" = "Generale";
diff --git a/resources/l10n/ja.lproj/Localizable.strings b/resources/l10n/ja.lproj/Localizable.strings
index da2492c1..caba21fc 100644
--- a/resources/l10n/ja.lproj/Localizable.strings
+++ b/resources/l10n/ja.lproj/Localizable.strings
@@ -63,7 +63,7 @@
 "Close window" = "ウィンドウを閉じる";
 
 /*No comment provided by engineer.*/
-"Don't check for updates periodically" = "定期的に更新を確認しない";
+"Don’t check for updates periodically" = "定期的に更新を確認しない";
 
 /*No comment provided by engineer.*/
 "General" = "一般設定";
diff --git a/resources/l10n/ko.lproj/Localizable.strings b/resources/l10n/ko.lproj/Localizable.strings
index 4381a756..e28ea364 100644
--- a/resources/l10n/ko.lproj/Localizable.strings
+++ b/resources/l10n/ko.lproj/Localizable.strings
@@ -63,7 +63,7 @@
 "Close window" = "창 닫기";
 
 /*No comment provided by engineer.*/
-"Don't check for updates periodically" = "주기적으로 업데이트를 확인하지 않기";
+"Don’t check for updates periodically" = "주기적으로 업데이트를 확인하지 않기";
 
 /*No comment provided by engineer.*/
 "General" = "일반";
diff --git a/resources/l10n/pt-BR.lproj/Localizable.strings b/resources/l10n/pt-BR.lproj/Localizable.strings
index ba59740a..50d4bc08 100644
--- a/resources/l10n/pt-BR.lproj/Localizable.strings
+++ b/resources/l10n/pt-BR.lproj/Localizable.strings
@@ -63,7 +63,7 @@
 "Close window" = "Fechar janela";
 
 /*No comment provided by engineer.*/
-"Don't check for updates periodically" = "Não verifique periodicamente por atualizações";
+"Don’t check for updates periodically" = "Não verifique periodicamente por atualizações";
 
 /*No comment provided by engineer.*/
 "General" = "Geral";
diff --git a/resources/l10n/tr.lproj/Localizable.strings b/resources/l10n/tr.lproj/Localizable.strings
index 4c57a69f..1d38fd42 100644
--- a/resources/l10n/tr.lproj/Localizable.strings
+++ b/resources/l10n/tr.lproj/Localizable.strings
@@ -63,7 +63,7 @@
 "Close window" = "Pencereyi kapat";
 
 /*No comment provided by engineer.*/
-"Don't check for updates periodically" = "Güncellemeleri periyodik olarak kontrol etme";
+"Don’t check for updates periodically" = "Güncellemeleri periyodik olarak kontrol etme";
 
 /*No comment provided by engineer.*/
 "General" = "Genel";
diff --git a/resources/l10n/zh-CN.lproj/Localizable.strings b/resources/l10n/zh-CN.lproj/Localizable.strings
index 03f5c059..8dc4b570 100644
--- a/resources/l10n/zh-CN.lproj/Localizable.strings
+++ b/resources/l10n/zh-CN.lproj/Localizable.strings
@@ -63,7 +63,7 @@
 "Close window" = "关闭窗口";
 
 /*No comment provided by engineer.*/
-"Don't check for updates periodically" = "不要自动检查更新";
+"Don’t check for updates periodically" = "不要自动检查更新";
 
 /*No comment provided by engineer.*/
 "General" = "通用";
diff --git a/resources/l10n/zh-TW.lproj/Localizable.strings b/resources/l10n/zh-TW.lproj/Localizable.strings
index 01c2e981..be10ba1c 100644
--- a/resources/l10n/zh-TW.lproj/Localizable.strings
+++ b/resources/l10n/zh-TW.lproj/Localizable.strings
@@ -63,7 +63,7 @@
 "Close window" = "關閉視窗";
 
 /*No comment provided by engineer.*/
-"Don't check for updates periodically" = "不要定期自動檢查更新";
+"Don’t check for updates periodically" = "不要定期自動檢查更新";
 
 /*No comment provided by engineer.*/
 "General" = "一般";
diff --git a/src/ui/FeedbackWindow.swift b/src/ui/FeedbackWindow.swift
index 3ce26caa..8c18b84c 100644
--- a/src/ui/FeedbackWindow.swift
+++ b/src/ui/FeedbackWindow.swift
@@ -63,13 +63,18 @@ class FeedbackWindow: NSWindow {
         contentView = view
     }
 
-    @objc
-    private func cancelCallback() {
+    @objc private func cancelCallback() {
         close()
     }
 
-    @objc
-    private func sendCallback() {
+    @objc private func sendCallback() {
+        if email.stringValue.isEmpty && !warnAboutNoEmail() {
+            return
+        }
+        openTicket()
+    }
+
+    func openTicket() {
         URLSession.shared.dataTask(with: prepareRequest(), completionHandler: { data, response, error in
             if error != nil || response == nil || (response as! HTTPURLResponse).statusCode != 201 {
                 debugPrint("HTTP call failed:", response ?? "nil", error ?? "nil")
@@ -78,6 +83,16 @@ class FeedbackWindow: NSWindow {
         close()
     }
 
+    func warnAboutNoEmail() -> Bool {
+        let alert = NSAlert()
+        alert.alertStyle = .warning
+        alert.messageText = NSLocalizedString("Are you sure you don’t want a response?", comment: "")
+        alert.informativeText = NSLocalizedString("You didn’t write your email, thus can’t receive any response.", comment: "")
+        alert.addButton(withTitle: NSLocalizedString("Send anyway", comment: ""))
+        alert.addButton(withTitle: NSLocalizedString("Cancel", comment: ""))
+        return alert.runModal() == NSApplication.ModalResponse.alertFirstButtonReturn
+    }
+
     private func prepareRequest() -> URLRequest {
         var request = URLRequest(url: URL(string: "https://api.github.com/repos/lwouis/alt-tab-macos/issues")!)
         request.httpMethod = "POST"
diff --git a/src/ui/preferences-window/tabs/UpdatesTab.swift b/src/ui/preferences-window/tabs/UpdatesTab.swift
index 0e4db45d..265456a6 100644
--- a/src/ui/preferences-window/tabs/UpdatesTab.swift
+++ b/src/ui/preferences-window/tabs/UpdatesTab.swift
@@ -14,7 +14,7 @@ class UpdatesTab: NSViewController, PreferencePane {
     var policyLock = false
 
     override func loadView() {
-        dontPeriodicallyCheck = NSButton(radioButtonWithTitle: NSLocalizedString("Don't check for updates periodically", comment: ""), target: self, action: #selector(updatePolicyCallback))
+        dontPeriodicallyCheck = NSButton(radioButtonWithTitle: NSLocalizedString("Don’t check for updates periodically", comment: ""), target: self, action: #selector(updatePolicyCallback))
         dontPeriodicallyCheck.fit()
         periodicallyCheck = NSButton(radioButtonWithTitle: NSLocalizedString("Check for updates periodically", comment: ""), target: self, action: #selector(updatePolicyCallback))
         periodicallyCheck.fit()