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크게 작게 위로 아래로 댓글로 가기 인쇄
로그 :
g5M1EkS08293: timeout waiting for input from mx4.hanmail.net. during client
greeting
g5M1EkS08293: g5M1OlS08295: DSN: User unknown

분석 :
mx4.hanmail.net 에서 서버로 메일을 보내기 위해 helo, Mail from
xxx@xxx.com , Rcpt To: yyy@yyy.com
과 같이 같은 진행했다고 할때 RCPT 를 하니 현재 서버에 yyy 라는 유저가 없으면 User
unknown 에러를 발생시키고
리턴을 하게 된다.. 그러면서 위와 같은 로그를 기록하게 된다.
이런 로그가 많이 오면 해당 서버로 오는 메일을 reject 시키던지 하는 방안을 강구해야 한다. 

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