sendmail 은 load average 가 일정 기준이상이 되면 동작을 안하게 됩니다.
(큐에 있는 메일을 보내려고 시도한다든지...)
현재 load average 가 너무 높군요.
먼저 그 이유를 파악하시는게 좋을 것 같네요.
 : 로그 기록 파일을 살펴보니까 아래와 같은 것이 1시간 단위로
: 체크를 하는 것 같아서 이상해서 글을 올립니다..
: 고수님 제가 초보라서 잘 몰라서 그러는데, 아시는 분은 답변을
: 부탁드립니다...
:
: [기록 파일]
: Apr 24 13:44:13 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 13
: Apr 24 13:44:13 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 13
: Apr 24 13:44:28 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 13
: Apr 24 13:44:28 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 13
: Apr 24 13:44:43 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 13
: Apr 24 13:44:43 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 13
: Apr 24 13:44:58 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 13
: Apr 24 13:44:58 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 13
: Apr 24 13:45:13 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 13
: Apr 24 13:45:13 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 13
: Apr 24 13:45:28 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 14
: Apr 24 13:45:28 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 14
: Apr 24 13:45:43 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 14
: Apr 24 13:45:43 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 14
: Apr 24 13:45:58 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 14
: Apr 24 13:45:58 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 14
: Apr 24 13:46:13 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 14
: Apr 24 13:46:13 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 14
: Apr 24 13:46:28 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 14
: Apr 24 13:46:28 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 14
: Apr 24 13:46:43 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 14
: Apr 24 13:46:43 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 14
: Apr 24 13:46:58 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 14
: Apr 24 13:46:58 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 14
: Apr 24 13:47:13 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 15
: Apr 24 13:47:13 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 15
: Apr 24 13:47:28 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 15
: Apr 24 13:47:28 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 15
: Apr 24 13:47:43 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 15
: Apr 24 13:47:43 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 15
: Apr 24 13:47:58 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 15
: Apr 24 13:47:58 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 15
: Apr 24 13:48:13 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 15
: Apr 24 13:48:13 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 15
: Apr 24 13:48:28 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 16
: Apr 24 13:48:28 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 16
: Apr 24 13:48:43 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 16
: Apr 24 13:48:43 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 16
: Apr 24 13:48:58 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 16
: Apr 24 13:48:58 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 16
: Apr 24 13:49:13 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 16
: Apr 24 13:49:13 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 16
: Apr 24 13:49:28 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 16
: Apr 24 13:49:28 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 16
: Apr 24 13:49:43 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 16
: Apr 24 13:49:43 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 16
: Apr 24 13:49:58 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 16
: Apr 24 13:49:58 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 16
: Apr 24 13:50:13 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 16
: Apr 24 13:50:13 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 16
: Apr 24 13:50:28 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 17
: Apr 24 13:50:28 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 17
: Apr 24 13:50:43 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 17
: Apr 24 13:50:43 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 17
: Apr 24 13:50:58 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 17
: Apr 24 13:50:58 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 17
: Apr 24 13:51:13 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:51:13 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:51:28 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:51:28 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:51:43 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 19
: Apr 24 13:51:43 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 19
: Apr 24 13:51:58 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 19
: Apr 24 13:51:58 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 19
: Apr 24 13:52:13 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:52:13 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:52:28 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:52:28 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:52:43 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 17
: Apr 24 13:52:43 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 17
: Apr 24 13:52:58 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 17
: Apr 24 13:52:58 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 17
: Apr 24 13:53:13 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:53:13 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:53:28 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:53:28 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:53:43 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 17
: Apr 24 13:53:43 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 17
: Apr 24 13:53:58 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 17
: Apr 24 13:53:58 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 17
: Apr 24 13:54:13 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 17
: Apr 24 13:54:13 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 17
: Apr 24 13:54:28 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 17
: Apr 24 13:54:28 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 17
: Apr 24 13:54:43 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 17
: Apr 24 13:54:43 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 17
: Apr 24 13:54:58 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 17
: Apr 24 13:54:58 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 17
: Apr 24 13:55:13 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 17
: Apr 24 13:55:14 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 17
: Apr 24 13:55:29 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:55:29 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:55:44 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:55:44 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:55:59 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:55:59 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:56:14 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:56:14 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:56:29 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:56:29 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:56:44 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:56:44 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:56:59 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:56:59 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:57:14 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:57:14 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:57:29 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:57:29 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:57:44 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:57:44 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:57:59 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:57:59 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:58:14 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:58:14 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:58:29 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:58:29 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:58:44 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:58:44 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:58:59 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:58:59 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:59:14 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:59:14 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:59:29 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:59:29 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:59:44 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:59:44 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 13:59:59 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 13:59:59 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 14:00:14 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 14:00:14 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 14:00:29 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 14:00:29 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 14:00:44 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 18
: Apr 24 14:00:44 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 18
: Apr 24 14:00:59 xxx sendmail[24402]: rejecting connections on daemon MTA: load average: 19
: Apr 24 14:00:59 xxx sendmail[24402]: rejecting connections on daemon MSA: load average: 19--return true