Fix some logic errors in Sender::send, as before it was sending to the

sender rather than the recipient

src/mailstore/mod.rs

@@ -1,8 +1,5 @@
 use crate::prelude::{Host, Mailbox, Mailuser, Message, ParseMailboxError};
-use std::{
-    collections::HashMap,
-    str::FromStr,
-};
+use std::{collections::HashMap, str::FromStr};
 
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};

src/sender/mod.rs

@@ -1,5 +1,5 @@
 use {
-    crate::prelude::{CertificateStore, ClientCertificateStore, Request, Response},
+    crate::prelude::{CertificateStore, ClientCertificateStore, Mailuser, Request, Response},
     rustls::{internal::msgs::codec::Codec, ClientConfig, ClientConnection, StreamOwned},
     std::{
         io::{self, Read, Write},
@@ -25,7 +25,7 @@ where
     pub request: Request,
     /// A [CertificateStore] for servers known to us
     pub store: S,
-    /// A [CertificateStore] for mailboxes which exist on this system
+    /// A [ClientCertificateStore] for mailboxes which exist on this system
     pub client_store: C,
 }
 
@@ -47,13 +47,13 @@ where
         self.request.sender.host.to_string()
     }
 
-    pub fn send(self) -> Result<Response, Error> {
-        let dnsname = self
-            .host_string()
+    pub fn send(self, recipient: &Mailuser) -> Result<Response, Error> {
+        let dnsname = recipient
+            .to_string()
             .as_str()
             .try_into()
             .map_err(|_| Error::DnsError)?;
-        let mut it = self.request.sender.host.to_socket_addrs()?;
+        let mut it = recipient.host.to_socket_addrs()?;
         let client_cert = self.client_store.get_certificate(&self.request.sender);
         let verifier = Arc::new(Verifier::new(self.store));
         let Some(socket_addrs) = it.next() else {