diff --git a/package-lock.json b/package-lock.json
index ef720a7980..1f67a8c3ad 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3825,9 +3825,9 @@
       "integrity": "sha512-ce5d3q03Ex0sy4R14722Rmt6MT07Ua+k4FwDfdcToYJcMKNtRVQvJ6JCAPdAmAnbRb6CsX6aYb9m96NGod9uTw=="
     },
     "@types/semver": {
-      "version": "6.2.0",
-      "resolved": "https://registry.npmjs.org/@types/semver/-/semver-6.2.0.tgz",
-      "integrity": "sha512-1OzrNb4RuAzIT7wHSsgZRlMBlNsJl+do6UblR7JMW4oB7bbR+uBEYtUh7gEc/jM84GGilh68lSOokyM/zNUlBA=="
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/@types/semver/-/semver-6.2.1.tgz",
+      "integrity": "sha512-+beqKQOh9PYxuHvijhVl+tIHvT6tuwOrE9m14zd+MT2A38KoKZhh7pYJ0SNleLtwDsiIxHDsIk9bv01oOxvSvA=="
     },
     "@vue/babel-helper-vue-jsx-merge-props": {
       "version": "1.0.0",
diff --git a/package.json b/package.json
index 77d7fc56af..acaa918378 100644
--- a/package.json
+++ b/package.json
@@ -32,6 +32,7 @@
     "@nextcloud/auth": "^1.2.1",
     "@nextcloud/axios": "^1.3.1",
     "@nextcloud/dialogs": "^1.0.0",
+    "@nextcloud/event-bus": "^1.1.2",
     "@nextcloud/files": "^1.0.0",
     "@nextcloud/initial-state": "^1.1.0",
     "@nextcloud/l10n": "^1.0.1",
diff --git a/src/App.vue b/src/App.vue
index 8ded884886..6a4aca2290 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -25,14 +25,18 @@
 </template>
 
 <script>
+import {subscribe} from '@nextcloud/event-bus'
+
 import logger from './logger'
 import {matchError} from './errors/match'
 import MailboxLockedError from './errors/MailboxLockedError'
+import {collect} from "./service/ContactsInteraction";
 
 export default {
 	name: 'App',
 	mounted() {
 		this.sync()
+		this.collectInteractions()
 	},
 	methods: {
 		sync() {
@@ -56,6 +60,9 @@ export default {
 				}
 			}, 30 * 1000)
 		},
+		collectInteractions() {
+			subscribe('mail:interaction', collect)
+		}
 	},
 }
 </script>
diff --git a/src/components/Composer.vue b/src/components/Composer.vue
index 3738ec3e5e..393008300b 100644
--- a/src/components/Composer.vue
+++ b/src/components/Composer.vue
@@ -199,6 +199,7 @@ import {htmlToText, textToSimpleHtml} from '../util/HtmlHelper'
 import Loading from './Loading'
 import logger from '../logger'
 import TextEditor from './TextEditor'
+import {emit} from '@nextcloud/event-bus'
 
 const debouncedSearch = debouncePromise(findRecipient, 500)
 
@@ -421,7 +422,10 @@ export default {
 				.then(this.getMessageData())
 				.then(data => this.send(data))
 				.then(() => logger.info('message sent'))
-				.then(() => (this.state = STATES.FINISHED))
+				.then(() => {
+					emit('mail:interaction', {type: 'message-sent', recipient: this.selectedUser.user})
+					this.state = STATES.FINISHED
+				})
 				.catch(error => {
 					logger.error('could not send message', {error})
 					if (error && error.toString) {
diff --git a/src/components/Envelope.vue b/src/components/Envelope.vue
index f191da7d88..e1acfb12ab 100644
--- a/src/components/Envelope.vue
+++ b/src/components/Envelope.vue
@@ -43,6 +43,7 @@ import Moment from './Moment'
 
 import Avatar from './Avatar'
 import {calculateAccountColor} from '../util/AccountColor'
+import {emit} from '@nextcloud/event-bus'
 
 export default {
 	name: 'Envelope',
@@ -125,8 +126,15 @@ export default {
 		},
 	},
 	methods: {
-		onToggleFlagged() {
-			this.$store.dispatch('toggleEnvelopeFlagged', this.data)
+		async onToggleFlagged() {
+			await this.$store.dispatch('toggleEnvelopeFlagged', this.data)
+
+			if (this.data.flags.flagged) {
+				emit('mail:interaction', {
+					type: 'message-starred',
+					sender: this.data.from,
+				})
+			}
 		},
 		onToggleSeen() {
 			this.$store.dispatch('toggleEnvelopeSeen', this.data)
diff --git a/src/components/Message.vue b/src/components/Message.vue
index 886d31fcf4..675e14869a 100644
--- a/src/components/Message.vue
+++ b/src/components/Message.vue
@@ -81,6 +81,7 @@ import MessagePlainTextBody from './MessagePlainTextBody'
 import Loading from './Loading'
 import Logger from '../logger'
 import MessageAttachments from './MessageAttachments'
+import {emit} from '@nextcloud/event-bus'
 
 export default {
 	name: 'Message',
@@ -231,7 +232,12 @@ export default {
 			})
 		},
 		onToggleSeen() {
-			this.$store.dispatch('toggleEnvelopeSeen', this.envelope)
+			this.$store.dispatch('toggleEnvelopeSeen', this.envelope).then(() => {
+				emit('mail:interaction', {
+					type: 'message-read',
+					recipient: this.selectedUser.user,
+				})
+			})
 		},
 		onDelete(e) {
 			// Don't try to navigate to the deleted message
@@ -251,7 +257,12 @@ export default {
 			}
 
 			this.$emit('delete', this.envelope)
-			this.$store.dispatch('deleteMessage', this.envelope)
+			this.$store.dispatch('deleteMessage', this.envelope).then(() => {
+				emit('mail:interaction', {
+					type: 'message-delete',
+					recipient: this.selectedUser.user,
+				})
+			})
 
 			if (!next) {
 				Logger.debug('no next/previous envelope, not navigating')
diff --git a/src/service/ContactsInteraction.js b/src/service/ContactsInteraction.js
new file mode 100644
index 0000000000..6aec637c8d
--- /dev/null
+++ b/src/service/ContactsInteraction.js
@@ -0,0 +1,26 @@
+/*
+ * @copyright 2020 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @author 2020 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import logger from '../logger'
+
+export const collect = data => {
+	logger.info('collecting user interaction data', {data})
+}