邮件无法发送，log文件里看不到发送日志记录

前段时间服务器遭到攻击以后重做了一次系统，这2天需要用一下uchome邮件发送的功能，按照论坛上官方给的配置了一下，结果邮件发送失败，data/log目录下的201010_SMTP.php中的日志记录到2010-10-12 10:57:31，那天正好是我重做系统的时间，后来就再也没产生记录，初步判定应该是服务器设置的问题，在论坛上找了大半天，也没有发现关于邮件配置时服务器配置的相关文章，希望高人能给指点一下，我的服务器是2003server+Apache2.2+php-5.2.14，不知道跟服务器端口开启关系大不，我UCH后台邮件设置和log日志如下：

SMTP日志如下：

1. <?PHP exit;?> 2010-10-12 09:39:00 61.51.90.165 10593 /do.php?ac=sendmail&rand=1286847538 (smtp.21cn.com:25) END - 553 this mail is rejected by antispam system, id=FREE-AS1-SMTP.18765.1286847539&date=2010101209
   
2. <?PHP exit;?> 2010-10-12 10:01:30 123.53.61.209 10548 /do.php?ac=sendmail&rand=1286848888 (smtp.21cn.com:25) END - 553 this mail is rejected by antispam system, id=FREE-AS1-SMTP.14919.1286848890&date=2010101210
   
3. <?PHP exit;?> 2010-10-12 10:39:59 124.115.4.199 0 /do.php?ac=sendmail&rand=1286851190 (smtp.21cn.com:25) END - 553 this mail is rejected by antispam system, id=FREE-AS4-SMTP.25932.1286851199&date=2010101210
   
4. <?PHP exit;?> 2010-10-12 10:45:33 219.150.166.90 10229 /do.php?ac=sendmail&rand=1286851533 (smtp.21cn.com:25) END - 553 this mail is rejected by antispam system, id=FREE-AS4-SMTP.31296.1286851533&date=2010101210
   
5. <?PHP exit;?> 2010-10-12 10:50:54 121.63.42.35 11438 /do.php?ac=sendmail&rand=1286851851 (smtp.21cn.com:25) END - 553 this mail is rejected by antispam system, id=FREE-AS4-SMTP.3725.1286851854&date=2010101210
   
6. <?PHP exit;?> 2010-10-12 10:54:14 58.19.30.14 7864 /do.php?ac=sendmail&rand=1286852046 (smtp.21cn.com:25) END - 553 this mail is rejected by antispam system, id=FREE-AS4-SMTP.6985.1286852054&date=2010101210
   
7. <?PHP exit;?> 2010-10-12 10:57:31 60.219.71.94 0 /do.php?ac=sendmail&rand=1286852247 (smtp.21cn.com:25) END - 553 this mail is rejected by antispam system, id=FREE-AS4-SMTP.9985.1286852251&date=2010101210

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没有产生日志文件，是不是跟php的配置有关系呀，谁知道这个咋弄呀