每日提醒1.2版本有部分人收不到邮件已解决悬赏10积分

一直运行都正常，所有人都可以收到每日提醒。前几天突然发现我收不到邮件了。手动运行了一下，发现前面一部分人发出去了，后面的没发出去。没发出去的提示的错误是： 2013-04-18 19:41:42 sending to zhangxiang, Strict Standards: Non-static method sql::select() should not be called statically, assuming $this from incompatible context in /opt/lampp/zentao/lib/dao/dao.class.php on line 239 Strict Standards: Non-static method sql::factory() should not be called statically, assuming $this from incompatible context in /opt/lampp/zentao/lib/dao/dao.class.php on line 1127 SMTP -> FROM SERVER:503 Unexpected command or sequence of commands <br />SMTP -> ERROR: MAIL not accepted from server: 503 Unexpected command or sequence of commands <br />fail: <xmp class='a-left'>Array ( [0] => 发送地址错误：zentao@basewin.com ) </xmp>ok

 我有问过邮箱管理员，没有更改过邮箱的配置。那么会是什么原因呢？