Assorted fixes.

* libmailutils/mailer/mailer.c (mu_mailer_send_fragments): Fix
3rd argument to _set_to.
* libproto/mailer/smtp.c (smtp_send_message): SIZE capability
can appear alone, without specifying maximum size.
* mh/mh_whom.c (mh_alias_expand): Recreate domain part for addresses
missing it.

@@ -666,7 +666,7 @@ mu_mailer_send_fragments (mu_mailer_t mailer,
   if (sender_addr)
     from = sender_addr;
 
-  status = _set_to (&rcpt_addr, msg, from, mailer);
+  status = _set_to (&rcpt_addr, msg, to, mailer);
   if (status)
     return status;
   if (rcpt_addr)

@@ -467,10 +467,13 @@ smtp_send_message (mu_mailer_t mailer, mu_message_t msg,
       mu_message_lines (msg, &lines) == 0)
     {
       size_t msgsize = size + lines;
-      size_t maxsize = strtoul (size_str + 5, NULL, 10);
+      if (strncmp (size_str, "SIZE=", 5) == 0)
+	{
+	  size_t maxsize = strtoul (size_str + 5, NULL, 10);
 
-      if (msgsize && msgsize > maxsize)
-	return EFBIG;
+	  if (msgsize && maxsize && msgsize > maxsize)
+	    return EFBIG;
+	}
       status = mu_smtp_mail_basic (smtp, mail_from,
 				   "SIZE=%lu",
 				   (unsigned long) msgsize);

@@ -81,19 +81,23 @@ mh_alias_expand (const char *str, mu_address_t *paddr, int *incl)
 
       if (mu_address_sget_domain (addr, i, &key) == 0 && key == NULL)
 	{
-	  if (mu_address_sget_local_part (addr, i, &key) == 0
-	      && mh_alias_get_address (key, paddr, incl) == 0)
-	    continue;
+	  if (mu_address_sget_local_part (addr, i, &key) ||
+	      mh_alias_get_address (key, paddr, incl) == 0 ||
+	      /* Recreating address from local part adds the default
+		 domain to it: */
+              mu_address_create (&subaddr, key))
+            continue;
 	}
-
-      status = mu_address_get_nth (addr, i, &subaddr);
-      if (status)
-	{
-	  mu_error (_("%s: cannot get address #%lu: %s"),
-		    str, (unsigned long) i, mu_strerror (status));
-	  continue;
-	}
-
+      else 
+        {
+          status = mu_address_get_nth (addr, i, &subaddr);
+          if (status)
+	    {
+	      mu_error (_("%s: cannot get address #%lu: %s"),
+			str, (unsigned long) i, mu_strerror (status));
+	      continue;
+	    }
+        }   
       mu_address_union (paddr, subaddr);
       mu_address_destroy (&subaddr);
     }