diff --git a/public/language/en-GB/admin/settings/chat.json b/public/language/en-GB/admin/settings/chat.json
index 6d6cad284b..b491a3104b 100644
--- a/public/language/en-GB/admin/settings/chat.json
+++ b/public/language/en-GB/admin/settings/chat.json
@@ -10,8 +10,6 @@
 	"max-chat-room-name-length": "Maximum length of chat room names",
 	"max-room-size": "Maximum number of users in chat rooms",
 	"delay": "Time between chat messages (ms)",
-	"notification-delay": "Notification delay for chat messages",
-	"notification-delay-help": "Additional messages sent between this time are collated, and the user is notified once per delay period. Set this to 0 to disable the delay.",
 	"restrictions.seconds-edit-after": "Number of seconds a chat message will remain editable.",
 	"restrictions.seconds-delete-after": "Number of seconds a chat message will remain deletable."
 }
\ No newline at end of file
diff --git a/public/language/en-GB/admin/settings/notifications.json b/public/language/en-GB/admin/settings/notifications.json
index c6d8b928ce..a2f82b82fb 100644
--- a/public/language/en-GB/admin/settings/notifications.json
+++ b/public/language/en-GB/admin/settings/notifications.json
@@ -3,5 +3,7 @@
 	"welcome-notification": "Welcome Notification",
 	"welcome-notification-link": "Welcome Notification Link",
 	"welcome-notification-uid": "Welcome Notification User (UID)",
-	"post-queue-notification-uid": "Post Queue User (UID)"
+	"post-queue-notification-uid": "Post Queue User (UID)",
+	"notification-delay": "Delay for sending notification emails (seconds)",
+	"notification-delay-help": "If the user has read the notification within this time, the email will not be sent.<br/>Default: 60 seconds."
 }
\ No newline at end of file
diff --git a/src/notifications.js b/src/notifications.js
index e7db55cf99..6aa5088594 100644
--- a/src/notifications.js
+++ b/src/notifications.js
@@ -282,7 +282,10 @@ async function pushToUids(uids, notification) {
 				notificationCache.delete(cacheKey);
 			}
 		} else {
-			await sendEmail({ uids: results.uidsToEmail, notification });
+			notificationCache.set(`delayed:nid:${notification.nid}`, {
+				uids: results.uidsToEmail,
+				notification,
+			});
 		}
 	}
 
@@ -294,11 +297,22 @@ async function pushToUids(uids, notification) {
 	});
 }
 
-async function sendEmail({ uids, notification }, mergeId, reason) {
+async function sendEmail({ uids, notification }, cacheKey, reason) {
 	if ((reason && reason === 'set') || !uids.length) {
 		return;
 	}
 
+	// check if notification already read by users
+	// if so don't send email, https://github.com/NodeBB/NodeBB/issues/5867
+	const hasRead = await db.isMemberOfSortedSets(
+		uids.map(uid => `uid:${uid}:notifications:read`),
+		notification.nid
+	);
+	uids = uids.filter((uid, index) => !hasRead[index]);
+	if (!uids.length) {
+		return;
+	}
+
 	// Update CTA messaging (as not all notification types need custom text)
 	if (['new-reply', 'new-chat'].includes(notification.type)) {
 		notification['cta-type'] = notification.type;
diff --git a/src/views/admin/settings/chat.tpl b/src/views/admin/settings/chat.tpl
index df1c4e21e0..920783c2bd 100644
--- a/src/views/admin/settings/chat.tpl
+++ b/src/views/admin/settings/chat.tpl
@@ -59,12 +59,6 @@
 					<label class="form-label" for="chatMessageDelay">[[admin/settings/chat:delay]]</label>
 					<input id="chatMessageDelay" type="text" class="form-control" data-field="chatMessageDelay">
 				</div>
-
-				<div class="mb-3">
-					<label class="form-label" for="notificationSendDelay">[[admin/settings/chat:notification-delay]]</label>
-					<input id="notificationSendDelay" type="text" class="form-control" value="60" data-field="notificationSendDelay">
-					<p class="form-text">[[admin/settings/chat:notification-delay-help]]</p>
-				</div>
 			</div>
 		</div>
 		<!-- IMPORT admin/partials/settings/toc.tpl -->
diff --git a/src/views/admin/settings/notifications.tpl b/src/views/admin/settings/notifications.tpl
index 4e4acee477..f912f13259 100644
--- a/src/views/admin/settings/notifications.tpl
+++ b/src/views/admin/settings/notifications.tpl
@@ -21,7 +21,11 @@
 					<label class="form-label">[[admin/settings/notifications:post-queue-notification-uid]]</label>
 					<input type="text" class="form-control" data-field="postQueueNotificationUid">
 				</div>
-
+				<div class="mb-3">
+					<label class="form-label" for="notificationSendDelay">[[admin/settings/notifications:notification-delay]]</label>
+					<input id="notificationSendDelay" type="text" class="form-control" value="60" data-field="notificationSendDelay">
+					<p class="form-text">[[admin/settings/notifications:notification-delay-help]]</p>
+				</div>
 			</div>
 		</div>