에러메세지가 3개가 와 있어요

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하나
Error Message : 550 5.7.1 Sorry,access denied(anti-spam:210.219.42.11)

-- You SendMail --

>>Delivered-To: NonLocalFolder
>>Received: from localhost.localdomain (127.0.0.1)
>> by webmail.medicenter.org (210.219.42.11) with [NmailJ V1.0 20010808(S)]
>> for from ;
>> Tue Apr 01 15:20:54 KST 2003
>>Message-ID: <****@****>
>>Date: Tue, 1 Apr 2003 15:20:54 +0900 (KST)
>>From: 관리자
>>To: ****@****, ****@****, ****@****,
>> ****@****, ****@****, ****@****,
>> ****@****
>>Subject: 의료기기종합정보지원센터 회원가입되었습니다 ****@****
>>Mime-Version: 1.0
>>Content-Type: text/html; charset=euc-kr
>>Content-Transfer-Encoding: 7bit
----------------------------------------

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둘
Error Message : java.lang.NullPointerException

-- You SendMail --

>>Delivered-To: NonLocalFolder
>>Received: from localhost.localdomain (127.0.0.1)
>> by webmail.medicenter.org (210.219.42.11) with [NmailJ V1.0 20010808(S)]
>> for from ;
>> Tue Apr 01 15:20:54 KST 2003
>>Message-ID: <****@****>
>>Date: Tue, 1 Apr 2003 15:20:54 +0900 (KST)
>>From: 관리자
>>To: ****@****, ****@****, ****@****,
>> ****@****, ****@****, ****@****,
>> ****@****
>>Subject: 의료기기종합정보지원센터 회원가입되었습니다 ****@****
>>Mime-Version: 1.0
>>Content-Type: text/html; charset=euc-kr
>>Content-Transfer-Encoding: 7bit
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세번째는 두번째와 같네요.

어떤 해결방안이 있을까요?

답변 기다리겠습니다.