Import upstream v0.16.23, stripped

Upstream commit: 9d1c75ab68435e4417337f768291e5f947686203
Enterprise-only files removed or emptied: 63
Enterprise-only snippets removed: 118 in 50 files
Dangling module declarations removed: 5
Edits turning enterprise off: 25
Third-party code: 14 files, 0 not in THIRD-PARTY.md
Verification: clean

One snippet more than v0.16.22, in crates/common/src/auth/authentication.rs
(3, was 2).

crates/smtp/src/inbound/data.rs

@@ -441,7 +441,7 @@ impl<T: SessionStream> Session<T> {
             if !rc.analysis.forward {
                 self.data
                     .rcpt_to
-                    .retain(|rcpt| !rc.analysis.is_report_address(rcpt.report_address()));
+                    .retain(|rcpt| !rc.analysis.is_report_address(rcpt.orig_address()));
             }
 
             if self.data.rcpt_to.is_empty() {

crates/smtp/src/inbound/rcpt.rs

@@ -202,8 +202,8 @@ impl<T: SessionStream> Session<T> {
                 let mut new_addr = SessionAddress::new(address);
 
                 if !self.data.rcpt_to.contains(&new_addr) {
-                    new_addr.dsn_info = format!("rfc822;{}", orig_addr.address_lcase).into();
                     new_addr.flags = orig_addr.flags;
+                    new_addr.dsn_info = orig_addr.address_lcase.into();
                     self.data.rcpt_to.push(new_addr);
                 } else {
                     trc::event!(
@@ -353,7 +353,6 @@ impl<T: SessionStream> Session<T> {
         // Expand list
         if let Some(members) = rcpt_members {
             let list_addr = self.data.rcpt_to.pop().unwrap();
-            let orcpt = format!("rfc822;{}", list_addr.address_lcase);
             for member in members.as_ref() {
                 let member_lcase = member.to_lowercase();
                 let is_local = match self
@@ -399,7 +398,7 @@ impl<T: SessionStream> Session<T> {
                 if !self.data.rcpt_to.contains(&member_addr)
                     && member_addr.address_lcase != list_addr.address_lcase
                 {
-                    member_addr.dsn_info = orcpt.clone().into();
+                    member_addr.dsn_info = list_addr.address_lcase.clone().into();
                     member_addr.flags = list_addr.flags;
                     self.data.rcpt_to.push(member_addr);
                 }

crates/smtp/src/inbound/spam.rs

@@ -89,17 +89,7 @@ impl<T: SessionStream> Session<T> {
                 .iter()
                 .map(|r| r.address_lcase.as_str())
                 .collect(),
-            env_rcpt_orig_to: self
-                .data
-                .rcpt_to
-                .iter()
-                .map(|r| {
-                    r.dsn_info
-                        .as_deref()
-                        .and_then(|info| info.strip_prefix("rfc822;"))
-                        .unwrap_or(r.address_lcase.as_str())
-                })
-                .collect(),
+            env_rcpt_orig_to: self.data.rcpt_to.iter().map(|r| r.orig_address()).collect(),
             is_test: false,
             is_train: false,
         }