trim leading and trailing whitespace in mail addresses

lib/msf/core/exploit/smtp_deliver.rb

@@ -166,8 +166,11 @@ module Exploit::Remote::SMTPDeliver
       nsock = connect_login(false)
     end
 
-    raw_send_recv("MAIL FROM: <#{datastore['MAILFROM']}>\r\n", nsock)
-    res = raw_send_recv("RCPT TO: <#{datastore['MAILTO']}>\r\n", nsock)
+    mailto = datastore['MAILTO'].strip
+    mailfrom = datastore['MAILFROM'].strip
+
+    raw_send_recv("MAIL FROM: <#{mailfrom}>\r\n", nsock)
+    res = raw_send_recv("RCPT TO: <#{mailto}>\r\n", nsock)
     if res[0..2] == '250'
       resp = raw_send_recv("DATA\r\n", nsock)
 
@@ -199,7 +202,7 @@ module Exploit::Remote::SMTPDeliver
         send_status = raw_send_recv("#{full_msg}\r\n.\r\n", nsock)
       end
     else
-      print_error "Server refused to send to <#{datastore['MAILTO']}>"
+      print_error "Server refused to send to <#{mailto}>"
     end
 
     if not already_connected