diff --git a/deltachat-ffi/deltachat.h b/deltachat-ffi/deltachat.h
index abc3f0ef0..759ad65ff 100644
--- a/deltachat-ffi/deltachat.h
+++ b/deltachat-ffi/deltachat.h
@@ -6784,8 +6784,8 @@ void dc_event_unref(dc_event_t* event);
  * UI should update the list.
  *
  * The event is emitted when the transports are modified on another device
- * using the JSON-RPC calls `add_or_update_transport`, `add_transport_from_qr`, `delete_transport`
- * or `set_config(configured_addr)`.
+ * using the JSON-RPC calls `add_or_update_transport`, `add_transport_from_qr`, `delete_transport`,
+ * `set_transport_unpublished` or `set_config(configured_addr)`.
  */
 #define DC_EVENT_TRANSPORTS_MODIFIED           2600
 
diff --git a/deltachat-jsonrpc/src/api.rs b/deltachat-jsonrpc/src/api.rs
index a1cc8699a..a07df3530 100644
--- a/deltachat-jsonrpc/src/api.rs
+++ b/deltachat-jsonrpc/src/api.rs
@@ -528,6 +528,7 @@ impl CommandApi {
     ///   from a server encoded in a QR code.
     /// - [Self::list_transports()] to get a list of all configured transports.
     /// - [Self::delete_transport()] to remove a transport.
+    /// - [Self::set_transport_unpublished()] to set whether contacts see this transport.
     async fn add_or_update_transport(
         &self,
         account_id: u32,
@@ -571,8 +572,16 @@ impl CommandApi {
         ctx.delete_transport(&addr).await
     }
 
-    // TODO not sure if that's a good API design,
-    // but I'm also not sure about an alternative - Adding to EnteredLoginParam?
+    /// Change whether the transport is unpublished.
+    ///
+    /// Unpublished transports are not advertised to contacts,
+    /// and self-sent messages are not sent there,
+    /// so that we don't cause extra messages to the corresponding inbox,
+    /// but can still receive messages from contacts who don't know the new relay addresses yet.
+    ///
+    /// The default is true, but when updating,
+    /// existing secondary transports are set to unpublished,
+    /// so that an existing transport address doesn't suddenly get spammed with a lot of messages.
     async fn set_transport_unpublished(
         &self,
         account_id: u32,
@@ -580,19 +589,14 @@ impl CommandApi {
         unpublished: bool,
     ) -> Result<()> {
         let ctx = self.get_context(account_id).await?;
-        ctx.set_transport_unpublished(addr, unpublished).await
+        ctx.set_transport_unpublished(&addr, unpublished).await
     }
 
-    // TODO not sure if that's a good API design,
-    // but I'm also not sure about an alternative - Adding to EnteredLoginParam?
-    async fn get_transport_unpublished(
-        &self,
-        account_id: u32,
-        addr: String,
-        unpublished: bool,
-    ) -> Result<()> {
+    /// Check whether the transport is unpublished.
+    /// See [`Self::set_transport_unpublished`] / `setTransportUnpublished` for details.
+    async fn is_transport_unpublished(&self, account_id: u32, addr: String) -> Result<bool> {
         let ctx = self.get_context(account_id).await?;
-        ctx.get_transport_unpublished(addr, unpublished).await
+        ctx.is_transport_unpublished(&addr).await
     }
 
     /// Signal an ongoing process to stop.
diff --git a/src/configure.rs b/src/configure.rs
index 099f1ecac..582ae2349 100644
--- a/src/configure.rs
+++ b/src/configure.rs
@@ -110,6 +110,7 @@ impl Context {
     ///   from a server encoded in a QR code.
     /// - [Self::list_transports()] to get a list of all configured transports.
     /// - [Self::delete_transport()] to remove a transport.
+    /// - [Self::set_transport_unpublished()] to set whether contacts see this transport.
     pub async fn add_or_update_transport(&self, param: &mut EnteredLoginParam) -> Result<()> {
         self.stop_io().await;
         let result = self.add_transport_inner(param).await;
@@ -261,6 +262,38 @@ impl Context {
         Ok(())
     }
 
+    /// Change whether the transport is unpublished.
+    ///
+    /// Unpublished transports are not advertised to contacts,
+    /// and self-sent messages are not sent there,
+    /// so that we don't cause extra messages to the corresponding inbox,
+    /// but can still receive messages from contacts who don't know the new relay addresses yet.
+    ///
+    /// The default is true, but when updating,
+    /// existing secondary transports are set to unpublished,
+    /// so that an existing transport address doesn't suddenly get spammed with a lot of messages.
+    pub async fn set_transport_unpublished(&self, addr: &str, unpublished: bool) -> Result<()> {
+        self.sql
+            .execute(
+                "UPDATE transports SET is_published=? WHERE addr=?",
+                (!unpublished, addr),
+            )
+            .await?;
+        send_sync_transports(self).await?;
+        Ok(())
+    }
+
+    /// Check whether the transport is unpublished.
+    /// See [`Self::set_transport_unpublished`] for details.
+    pub async fn is_transport_unpublished(&self, addr: &str) -> Result<bool> {
+        let published: bool = self
+            .sql
+            .query_get_value("SELECT is_published FROM transports WHERE addr=?", (addr,))
+            .await?
+            .context("is_published is not supposed to be NULL")?;
+        Ok(!published)
+    }
+
     async fn inner_configure(&self, param: &EnteredLoginParam) -> Result<()> {
         info!(self, "Configure ...");
 
@@ -627,7 +660,7 @@ async fn configure(ctx: &Context, param: &EnteredLoginParam) -> Result<Option<&'
     let provider = configured_param.provider;
     configured_param
         .clone()
-        .save_to_transports_table(ctx, param, time())
+        .save_to_transports_table(ctx, param, time(), true)
         .await?;
     send_sync_transports(ctx).await?;
 
diff --git a/src/sql/migrations.rs b/src/sql/migrations.rs
index 59a8810ba..672fa61f8 100644
--- a/src/sql/migrations.rs
+++ b/src/sql/migrations.rs
@@ -2343,10 +2343,12 @@ ALTER TABLE contacts ADD COLUMN name_normalized TEXT;
         .await?;
     }
 
-    // Add a `published` flag to transports.
+    // Add an `is_published` flag to transports.
     // Unpublished transports are not advertised to contacts,
-    // and self-sent messages are not sent there.
-    // The default is published, but when updating,
+    // and self-sent messages are not sent there,
+    // so that we don't cause extra messages to the corresponding inbox,
+    // but can still receive messages from contacts who don't know the new relay addresses yet.
+    // The default is true, but when updating,
     // existing secondary transports are set to unpublished,
     // so that an existing transport address doesn't suddenly get spammed with a lot of messages.
     inc_and_check(&mut migration_version, 149)?;
diff --git a/src/sync.rs b/src/sync.rs
index b0dc32c75..580710b6a 100644
--- a/src/sync.rs
+++ b/src/sync.rs
@@ -65,6 +65,10 @@ pub(crate) struct TransportData {
 
     /// Timestamp of when the transport was last time (re)configured.
     pub(crate) timestamp: i64,
+
+    /// Whether the transport is published.
+    /// See [`Context::set_transport_unpublished`] for details.
+    pub(crate) is_published: bool,
 }
 
 #[derive(Debug, Serialize, Deserialize)]
diff --git a/src/transport.rs b/src/transport.rs
index 7e94f85a6..3359a9b36 100644
--- a/src/transport.rs
+++ b/src/transport.rs
@@ -561,8 +561,16 @@ impl ConfiguredLoginParam {
         context: &Context,
         entered_param: &EnteredLoginParam,
         timestamp: i64,
+        is_published: bool,
     ) -> Result<()> {
-        save_transport(context, entered_param, &self.into(), timestamp).await?;
+        save_transport(
+            context,
+            entered_param,
+            &self.into(),
+            timestamp,
+            is_published,
+        )
+        .await?;
         Ok(())
     }
 
@@ -628,6 +636,7 @@ pub(crate) async fn save_transport(
     entered_param: &EnteredLoginParam,
     configured: &ConfiguredLoginParamJson,
     add_timestamp: i64,
+    is_published: bool,
 ) -> Result<bool> {
     let addr = addr_normalize(&configured.addr);
     let configured_addr = context.get_config(Config::ConfiguredAddr).await?;
@@ -635,20 +644,23 @@ pub(crate) async fn save_transport(
     let mut modified = context
         .sql
         .execute(
-            "INSERT INTO transports (addr, entered_param, configured_param, add_timestamp)
-             VALUES (?, ?, ?, ?)
+            "INSERT INTO transports (addr, entered_param, configured_param, add_timestamp, is_published)
+             VALUES (?, ?, ?, ?, ?)
              ON CONFLICT (addr)
              DO UPDATE SET entered_param=excluded.entered_param,
                            configured_param=excluded.configured_param,
-                           add_timestamp=excluded.add_timestamp
+                           add_timestamp=excluded.add_timestamp,
+                           is_published=excluded.is_published,
              WHERE entered_param != excluded.entered_param
                  OR configured_param != excluded.configured_param
-                 OR add_timestamp < excluded.add_timestamp",
+                 OR add_timestamp < excluded.add_timestamp
+                 OR is_published != excluded.is_published",
             (
                 &addr,
                 serde_json::to_string(entered_param)?,
                 serde_json::to_string(configured)?,
                 add_timestamp,
+                is_published,
             ),
         )
         .await?
@@ -685,7 +697,7 @@ pub(crate) async fn send_sync_transports(context: &Context) -> Result<()> {
     let transports = context
         .sql
         .query_map_vec(
-            "SELECT entered_param, configured_param, add_timestamp
+            "SELECT entered_param, configured_param, add_timestamp, is_published
              FROM transports WHERE id>1",
             (),
             |row| {
@@ -694,10 +706,12 @@ pub(crate) async fn send_sync_transports(context: &Context) -> Result<()> {
                 let configured_json: String = row.get(1)?;
                 let configured: ConfiguredLoginParamJson = serde_json::from_str(&configured_json)?;
                 let timestamp: i64 = row.get(2)?;
+                let is_published: bool = row.get(3)?;
                 Ok(TransportData {
                     configured,
                     entered,
                     timestamp,
+                    is_published,
                 })
             },
         )
@@ -736,9 +750,10 @@ pub(crate) async fn sync_transports(
         configured,
         entered,
         timestamp,
+        is_published,
     } in transports
     {
-        modified |= save_transport(context, entered, configured, *timestamp).await?;
+        modified |= save_transport(context, entered, configured, *timestamp, *is_published).await?;
     }
 
     context
@@ -843,7 +858,7 @@ mod tests {
 
         param
             .clone()
-            .save_to_transports_table(&t, &EnteredLoginParam::default(), time())
+            .save_to_transports_table(&t, &EnteredLoginParam::default(), time(), true)
             .await?;
         let expected_param = r#"{"addr":"alice@example.org","imap":[{"connection":{"host":"imap.example.com","port":123,"security":"Starttls"},"user":"alice"}],"imap_user":"","imap_password":"foo","smtp":[{"connection":{"host":"smtp.example.com","port":456,"security":"Tls"},"user":"alice@example.org"}],"smtp_user":"","smtp_password":"bar","provider_id":null,"certificate_checks":"Strict","oauth2":false}"#;
         assert_eq!(
@@ -1061,7 +1076,7 @@ mod tests {
             certificate_checks: ConfiguredCertificateChecks::Automatic,
             oauth2: false,
         }
-        .save_to_transports_table(&t, &EnteredLoginParam::default(), time())
+        .save_to_transports_table(&t, &EnteredLoginParam::default(), time(), true)
         .await?;
 
         let (_transport_id, loaded) = ConfiguredLoginParam::load(&t).await?.unwrap();