> Tidak ada error di MDaemon system log yang menginformasikan POP3 atau SMTP
service stop?
> Bagaimana dengan windows event viewer?

Untuk yang pop3 kejadiannya tadi malam, di system log hanya ada informasi
imap server busy Pak, 
Tidak ada srvice yang stoping, semua masih hijau, kemudian saya restart
service pop3 nya, baru semua client kembali normal
Berikut penggalan system log ketika saya coba restart service pop3 nya 

Wed 2016-06-01 15:22:14: *  Files are current
Wed 2016-06-01 15:22:14: ----------
Wed 2016-06-01 15:35:50: Processing Retry Queue
Wed 2016-06-01 15:35:50: ----------
Wed 2016-06-01 16:55:11: Processing Retry Queue
Wed 2016-06-01 16:55:11: ----------
Wed 2016-06-01 18:00:32: Processing Retry Queue
Wed 2016-06-01 18:00:32: ----------
Wed 2016-06-01 19:05:01: Processing Retry Queue
Wed 2016-06-01 19:05:01: ----------
Wed 2016-06-01 20:07:05: Processing Retry Queue
Wed 2016-06-01 20:07:05: ----------
Wed 2016-06-01 20:37:15: Connection from 114.125.172.47 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:15: ----------
Wed 2016-06-01 20:37:15: Connection from 114.125.172.47 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:15: ----------
Wed 2016-06-01 20:37:16: Connection from 112.215.64.230 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:16: ----------
Wed 2016-06-01 20:37:16: Connection from 202.62.16.171 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:16: ----------
Wed 2016-06-01 20:37:16: Connection from 114.4.82.232 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:16: ----------
Wed 2016-06-01 20:37:16: Connection from 36.73.75.23 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:16: ----------
Wed 2016-06-01 20:37:16: Connection from 36.73.75.23 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:16: ----------
Wed 2016-06-01 20:37:16: Connection from 114.4.82.232 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:16: ----------
Wed 2016-06-01 20:37:16: Connection from 36.77.220.6 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:16: ----------
Wed 2016-06-01 20:37:17: Connection from 36.77.220.6 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 36.77.220.6 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 114.4.82.232 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 36.77.220.6 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 36.77.220.6 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 36.77.220.6 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 36.77.220.6 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 114.4.82.232 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 36.77.220.6 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 111.94.9.170 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 36.77.220.6 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 36.77.220.6 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 114.4.82.232 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 36.77.220.6 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 36.77.220.6 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 36.77.220.6 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:17: Connection from 114.4.82.232 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:17: ----------
Wed 2016-06-01 20:37:18: Connection from 114.4.82.232 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:18: ----------
Wed 2016-06-01 20:37:18: Connection from 114.4.77.97 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:18: ----------
Wed 2016-06-01 20:37:18: Connection from 52.5.32.241 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:18: ----------
Wed 2016-06-01 20:37:18: Connection from 112.215.66.97 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:18: ----------
Wed 2016-06-01 20:37:18: Connection from 111.94.9.170 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:18: ----------
Wed 2016-06-01 20:37:18: Connection from 114.4.82.232 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:18: ----------
Wed 2016-06-01 20:37:18: Connection from 114.4.82.232 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:18: ----------
Wed 2016-06-01 20:37:18: Connection from 112.215.66.97 refused, IMAP server
too busy.
Wed 2016-06-01 20:37:18: ----------
Wed 2016-06-01 20:37:33: POP3 server disabled
Wed 2016-06-01 20:37:33: ----------
Wed 2016-06-01 20:37:52: POP3 server enabled
Wed 2016-06-01 20:37:52: ----------
Wed 2016-06-01 21:33:36: Processing Retry Queue
Wed 2016-06-01 21:33:36: ----------
Wed 2016-06-01 22:34:29: Processing Retry Queue
Wed 2016-06-01 22:34:29: ----------
Wed 2016-06-01 23:35:20: Processing Retry Queue
Wed 2016-06-01 23:35:20: ----------


> Kelihatannya sih problem koneksi, tetapi perlu informasi lebih banyak
untuk memastikan.
> Saat SMTP atau POP3 service stop, services lain (IMAP, webmail) tetap
jalan normal?
> Mail masuk/keluar ke internet tetap berjalan normal saat itu?

Yang ini saya tidak bisa pastikan Pak, tetapi seharusnya service lain
berjalan normal seperti imap, webmail, dll
Namun ketika smtp ini error (icon gear tetap hijau), saya tidak bisa telent
ke smtp nya
Kemudian saya coba restart icon gear nya tidak kunjung merah, samapai
sekitar 3menit, dan akhirnya saya langsung restart OS nya Pak.


Terimakasih,
Asep. Y



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