imap problemi ?

mrb,
imap neden surekli login - logout yapar sizce ? bi fikri olan var mi ?
log dosyasi su sekilde : 
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Feb  5 00:10:56 localhost imapd: LOGIN, user=admin@xxxxxxxxxxx
, ip=[::ffff:127.0.0.1], protocol=IMAP
Feb  5 00:10:56 localhost imapd: LOGOUT, user=admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:127.0.0.1
], headers=0, body=0, time=1
Feb  5 00:10:56 localhost imapd: Connection, ip=[::ffff:127.0.0.1]
Feb  5 00:10:56 localhost imapd: LOGIN, user=admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx
, ip=[::ffff:127.0.0.1], protocol=IMAP
Feb  5 00:10:56 localhost imapd: Connection, ip=[::ffff:127.0.0.1]
Feb  5 00:10:56 localhost imapd: LOGIN, user=
admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:127.0.0.1], protocol=IMAP
Feb  5 00:10:56 localhost imapd: LOGOUT, user=admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx
, ip=[::ffff:127.0.0.1], headers=0, body=0, time=0
Feb  5 00:10:56 localhost imapd: LOGOUT, user=admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:
127.0.0.1], headers=0, body=0, time=0
Feb  5 00:10:57 localhost imapd: Connection, ip=[::ffff:127.0.0.1]
Feb  5 00:10:57 localhost imapd: LOGIN, user=
admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:127.0.0.1], protocol=IMAP
Feb  5 00:10:57 localhost imapd: LOGOUT, user=admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:
127.0.0.1], headers=0, body=0, time=0
Feb  5 00:10:57 localhost imapd: Connection, ip=[::ffff:127.0.0.1]
Feb  5 00:10:57 localhost imapd: LOGIN, user=
admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:127.0.0.1], protocol=IMAP
Feb  5 00:10:57 localhost imapd: LOGOUT, user=admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:
127.0.0.1], headers=0, body=0, time=0
Feb  5 00:10:57 localhost imapd: Connection, ip=[::ffff:127.0.0.1]
Feb  5 00:10:57 localhost imapd: LOGIN, user=
admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:127.0.0.1], protocol=IMAP
Feb  5 00:10:57 localhost imapd: LOGOUT, user=admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:
127.0.0.1], headers=0, body=0, time=0
Feb  5 00:11:00 localhost imapd: Connection, ip=[::ffff:127.0.0.1]
Feb  5 00:11:00 localhost imapd: LOGIN, user=
admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:127.0.0.1], protocol=IMAP
Feb  5 00:11:00 localhost imapd: LOGOUT, user=admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:
127.0.0.1], headers=0, body=0, time=0
Feb  5 00:11:01 localhost imapd: Connection, ip=[::ffff:127.0.0.1]
Feb  5 00:11:01 localhost imapd: LOGIN, user=
admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:127.0.0.1], protocol=IMAP
Feb  5 00:11:01 localhost imapd: LOGOUT, user=admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:
127.0.0.1], headers=0, body=0, time=0
Feb  5 00:11:01 localhost imapd: Connection, ip=[::ffff:127.0.0.1]
Feb  5 00:11:01 localhost imapd: LOGIN, user=
admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:127.0.0.1], protocol=IMAP
Feb  5 00:11:01 localhost imapd: LOGOUT, user=admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:
127.0.0.1], headers=0, body=0, time=0
Feb  5 00:12:21 localhost imapd: Connection, ip=[::ffff:127.0.0.1]
Feb  5 00:12:21 localhost imapd: LOGIN, user=
admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:127.0.0.1], protocol=IMAP
Feb  5 00:12:21 localhost imapd: Connection, ip=[::ffff:127.0.0.1]
Feb  5 00:12:21 localhost imapd: LOGOUT, user=
admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:127.0.0.1], headers=0, body=0, time=0
Feb  5 00:12:21 localhost imapd: LOGIN, user=
admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:127.0.0.1], protocol=IMAP
Feb  5 00:12:21 localhost imapd: LOGOUT, user=admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:
127.0.0.1], headers=0, body=0, time=0
Feb  5 00:12:21 localhost imapd: Connection, ip=[::ffff:127.0.0.1]
Feb  5 00:12:21 localhost imapd: LOGIN, user=
admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:127.0.0.1], protocol=IMAP
Feb  5 00:12:21 localhost imapd: LOGOUT, user=admin-AtSOsfatEL9BDgjK7y7TUQ@xxxxxxxxxxxxxxxx, ip=[::ffff:
127.0.0.1], headers=0, body=0, time=0
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bilgisayari actigimda login olup, kapatincaya dek logout olmamasi icin ne yapmaliyim bu imap'a ?
yardim ederseniz sevinirim.
hoscakalin.