寄信失敗

[八神安]

請問各位大大：使用者在寄信時是成功的可是在伺服器顯示寄信失敗這是為什麼請問大大幫我解答謝謝,以下是LOG檔↓
2004/04/06:18:32:16 WEBM 61.222.102.174 LI peter
2004/04/06:18:32:23 WEBM 61.222.102.174 LO
2004/04/06:19:25:57 WEBM 61.222.102.174 LI peter
2004/04/06:19:31:03 SMTP 127.0.0.1 SF xxxx@ton.adsldns.orgxxxx@NANYA.EDU.TW "Connection Closed Gracefully."
2004/04/06:19:31:03 SMTP 127.0.0.1 SF xxxx@ton.adsldns.org xxxx@NANYA.EDU.TW "After "
2004/04/06:19:31:05 SMTP 127.0.0.1 SF xxxx@ton.adsldns.org xxxx@NANYA.EDU.TW "Connection Closed Gracefully."
2004/04/06:19:31:05 SMTP 127.0.0.1 SF xxxx@ton.adsldns.org xxxx@NANYA.EDU.TW "After "
2004/04/06:19:33:07 WEBM 61.222.102.174 LO
2004/04/06:19:35:43 SMTP 127.0.0.1 RF xxxx@ton.adsldns.org xxxx@NANYA.EDU.TW "Connection Closed Gracefully."
2004/04/06:19:35:43 SMTP 127.0.0.1 RF xxxx@ton.adsldns.orgxxxx@NANYA.EDU.TW "After "
2004/04/06:19:35:54 SMTP 127.0.0.1 RF xxxx@ton.adsldns.org xxxx@NANYA.EDU.TW "Connection Closed Gracefully."
2004/04/06:19:35:54 SMTP 127.0.0.1 RF xxxx@ton.adsldns.org xxxx@NANYA.EDU.TW "After "
2004/04/06:19:36:44 WEBM 61.222.102.174 LI peter
2004/04/06:19:37:12 WEBM 61.222.102.174 LO
2004/04/06:19:45:47 SMTP 127.0.0.1 RF xxxx@ton.adsldns.org xxxx@NANYA.EDU.TW "Connection Closed Gracefully."
2004/04/06:19:45:47 SMTP 127.0.0.1 RF xxxx@ton.adsldns.org xxxx@NANYA.EDU.TW "After "
2004/04/06:19:45:59 SMTP 127.0.0.1 RF xxxx@ton.adsldns.org xxxx@NANYA.EDU.TW "Connection Closed Gracefully."
2004/04/06:19:45:59 SMTP 127.0.0.1 RF xxxx@ton.adsldns.org xxxx@NANYA.EDU.TW "After "
2004/04/06:19:56:07 SMTP 127.0.0.1 RF xxxx@ton.adsldns.org xxxx@NANYA.EDU.TW "Connection Closed Gracefully."
2004/04/06:19:56:07 SMTP 127.0.0.1 RF xxxx@ton.adsldns.org xxxx@NANYA.EDU.TW "After "
2004/04/06:19:56:09 SMTP 127.0.0.1 RF xxxx@ton.adsldns.org xxxx@NANYA.EDU.TW "Connection Closed Gracefully."
2004/04/06:19:56:09 SMTP 127.0.0.1 RF xxxx@ton.adsldns.org xxxx@NANYA.EDU.TW "After "
2004/04/06:20:05:54 SMTP 127.0.0.1 RF xxxx@ton.adsldns.orgxxxx@NANYA.EDU.TW "Connection Closed Gracefully."