diff --git a/dev/View/User/MailBox/MessageView.js b/dev/View/User/MailBox/MessageView.js
index faddb1400..b17b0b98f 100644
--- a/dev/View/User/MailBox/MessageView.js
+++ b/dev/View/User/MailBox/MessageView.js
@@ -529,7 +529,7 @@ export class MailMessageView extends AbstractViewRight {
 	newTag() {
 		let message = currentMessage();
 		if (message) {
-			let keyword = prompt(i18n('MESSAGE/NEW_TAG'), '')?.trim();
+			let keyword = prompt(i18n('MESSAGE/NEW_TAG'), '')?.replace(/\s+/g, '');
 			if (keyword.length) {
 				message.toggleTag(keyword);
 				FolderUserStore.currentFolder().permanentFlags.push(keyword);