chore: cleanup "primary" wording in comments

src/config.rs

@@ -195,9 +195,9 @@ pub enum Config {
     #[strum(props(default = "0"))]
     DeleteDeviceAfter,
 
-    /// The primary email address, used for sending and background fetch.
+    /// The address of the transport used for sending.
     ///
-    /// Device-local, other devices keep their own primary transport.
+    /// Device-local, other devices choose their own sending transport.
     ConfiguredAddr,
 
     /// Deprecated(2026-04).
@@ -806,7 +806,7 @@ impl Context {
                                     (time(), addr),
                                 )
                                 .context(
-                                    "Failed to update add_timestamp for the new primary transport",
+                                    "Failed to update add_timestamp for the new sending transport",
                                 )?;
 
                             // Clean up SMTP queue.
@@ -819,7 +819,8 @@ impl Context {
                             Ok(())
                         })
                         .await?;
-                    // Invalidate the cache so the sync message cannot read a stale primary address.
+                    // Invalidate the cache so the sync message
+                    // cannot read a stale sending address.
                     self.sql.uncache_raw_config("configured_addr").await;
                     send_sync_transports(self).await?;
                 }
@@ -917,8 +918,7 @@ impl Context {
             .any(|a| addr_cmp(addr, a)))
     }
 
-    /// Sets `primary_new` as the new primary self address and saves the old
-    /// primary address (if exists) as a secondary address.
+    /// Sets `primary_new` as the address used for sending.
     ///
     /// This should only be used by test code and during configure.
     #[cfg(test)] // AEAP is disabled, but there are still tests for it
@@ -940,7 +940,7 @@ impl Context {
             .await
     }
 
-    /// Returns the primary self address.
+    /// Returns the address of the transport used for sending.
     /// Returns an error if no self addr is configured.
     pub async fn get_primary_self_addr(&self) -> Result<String> {
         self.get_config(Config::ConfiguredAddr)

src/events/payload.rs

@@ -433,7 +433,7 @@ pub enum EventType {
         chat_id: ChatId,
     },
 
-    /// One or more transports has changed or another transport is primary now.
+    /// One or more transports has changed or another transport is used for sending now.
     ///
     /// UI should update the list.
     ///

src/mimefactory.rs

@@ -2467,7 +2467,7 @@ async fn non_chat_headers(
     Ok(headers)
 }
 
-/// Renders `queued_mail` for SMTP with the own key pair and primary address.
+/// Renders `queued_mail` for SMTP with the own key pair and sending address.
 async fn render_with_self_key(context: &Context, queued_mail: QueuedMail) -> Result<String> {
     let public_key = key::load_self_public_key(context).await?;
     let secret_key = key::load_self_secret_key(context).await?;

src/smtp.rs

@@ -730,9 +730,9 @@ pub(crate) async fn add_self_recipients(
     recipients: &mut Vec<String>,
     encrypted: bool,
 ) -> Result<()> {
-    // Avoid sending unencrypted messages to all transports, chatmail relays won't accept
-    // them. Normally the user should have a non-chatmail primary transport to send unencrypted
-    // messages.
+    // Avoid sending unencrypted messages to all transports,
+    // chatmail relays won't accept them. Normally the user should have
+    // a non-chatmail sending transport to send unencrypted messages.
     let from = context.get_primary_self_addr().await?;
     if encrypted {
         for addr in context.get_self_addrs().await? {

src/transport.rs

@@ -263,7 +263,7 @@ impl ConfiguredLoginParam {
     /// Load configured account settings from the database.
     ///
     /// Returns transport ID and configured parameters
-    /// of the current primary transport.
+    /// of the transport currently used for sending.
     /// Returns `None` if account is not configured.
     pub(crate) async fn load(context: &Context) -> Result<Option<(u32, Self)>> {
         let Some(self_addr) = context.get_config(Config::ConfiguredAddr).await? else {
@@ -532,7 +532,7 @@ pub(crate) async fn save_transport(
         > 0;
 
     if configured_addr.is_none() {
-        // If there is no transport yet, set the new transport as the primary one
+        // If there is no transport yet, use the new transport for sending
         context
             .sql
             .set_raw_config(Config::ConfiguredAddr.as_ref(), Some(&addr))
@@ -676,7 +676,7 @@ pub(crate) async fn sync_transports(
     }
 
     if let Some(new_addr) = reelected {
-        info!(context, "Re-elected primary transport {new_addr:?}.");
+        info!(context, "Re-elected sending transport {new_addr:?}.");
         context.sql.uncache_raw_config("configured_addr").await;
         modified = true;
     }