Dear Pak Syafril,

Saya sudah coba menghubungi pihak ISP saya dan setelah mereka cek tidak ada
masalah karena saya bisa kirim email dan browsing dengan baik.

Dan setelah saya cek dan menerima laporan dari user, rata-rata yg terkena
Connection timed out ini dari China semua.

Berikut adalah SMTP(In) :

Mon 2013-06-03 09:16:36: [2902:9] Session 2902; child 9
Mon 2013-06-03 09:16:36: [2902:9] Accepting SMTP connection from [
123.127.189.176:51792] to [118.97.92.178:25]
Mon 2013-06-03 09:16:36: [2902:9] --> 220 mail.indokemika.co.id ESMTP
MDaemon 13.0.4; Mon, 03 Jun 2013 09:16:36 +0700
Mon 2013-06-03 09:16:36: [2902:9] <-- EHLO OutSpam.cofco.com
Mon 2013-06-03 09:16:36: [2902:9] --> 250-mail.indokemika.co.id Hello
OutSpam.cofco.com, pleased to meet you
Mon 2013-06-03 09:16:36: [2902:9] --> 250-ETRN
Mon 2013-06-03 09:16:36: [2902:9] --> 250-AUTH LOGIN CRAM-MD5 PLAIN
Mon 2013-06-03 09:16:36: [2902:9] --> 250-8BITMIME
Mon 2013-06-03 09:16:36: [2902:9] --> 250 SIZE
Mon 2013-06-03 09:16:36: [2902:9] <-- MAIL FROM:<liuya...@cofco.com>
SIZE=118900
Mon 2013-06-03 09:16:36: [2902:9] Performing SPF lookup (cofco.com /
123.127.189.176)
Mon 2013-06-03 09:16:37: [2902:9] *  Result: none; no SPF record in DNS
Mon 2013-06-03 09:16:37: [2902:9] ---- End SPF results
Mon 2013-06-03 09:16:37: [2902:9] --> 250 <liuya...@cofco.com>, Sender ok
Mon 2013-06-03 09:16:37: [2902:9] <-- RCPT TO:<r...@indokemika.co.id>
Mon 2013-06-03 09:16:37: [2902:9] Performing DNS-BL lookup (123.127.189.176
- connecting IP)
Mon 2013-06-03 09:16:37: [2902:9] *  zen.spamhaus.org - passed
Mon 2013-06-03 09:16:37: [2902:9] *  bl.spamcop.net - passed
Mon 2013-06-03 09:16:37: [2902:9] *  cbl.abuseat.org - passed
Mon 2013-06-03 09:16:37: [2902:9] ---- End DNS-BL results
Mon 2013-06-03 09:16:37: [2902:9] --> 250 <r...@indokemika.co.id>,
Recipient ok
Mon 2013-06-03 09:16:38: [2902:9] <-- DATA
Mon 2013-06-03 09:16:38: [2902:9] Creating temp file (SMTP):
d:\mdaemon\queues\temp\md50000002694.tmp
Mon 2013-06-03 09:16:38: [2902:9] --> 354 Enter mail, end with <CRLF>.<CRLF>
Mon 2013-06-03 09:16:39: [2902:9] Message size: 118898 bytes
Mon 2013-06-03 09:16:39: [2902:9] Performing DKIM lookup
Mon 2013-06-03 09:16:39: [2902:9] *  File:
d:\mdaemon\queues\temp\md50000002694.tmp
Mon 2013-06-03 09:16:39: [2902:9] *  Message-ID:
2013060310162644271...@cofco.com
Mon 2013-06-03 09:16:40: [2902:9] *  Result: neutral
Mon 2013-06-03 09:16:40: [2902:9] ---- End DKIM results
Mon 2013-06-03 09:16:40: [2902:9] Passing message through AntiVirus (Size:
118898)...
Mon 2013-06-03 09:16:40: [2902:9] *  Message is clean (no viruses found)
Mon 2013-06-03 09:16:40: [2902:9] ---- End AntiVirus results
Mon 2013-06-03 09:16:40: [2902:9] Spam filter scan skipped; message size
(118898) exceeds spam filter configured max size of (102400)
Mon 2013-06-03 09:16:40: [2902:9] Message creation successful:
d:\mdaemon\queues\inbound\md50001327764.msg
Mon 2013-06-03 09:16:40: [2902:9] --> 250 Ok, message saved <Message-ID:
2013060310162644271...@cofco.com>
Mon 2013-06-03 09:16:40: [2902:9] <-- QUIT
Mon 2013-06-03 09:16:40: [2902:9] --> 221 See ya in cyberspace
Mon 2013-06-03 09:16:40: [2902:9] SMTP session successful (Bytes in/out:
119020/434)
Mon 2013-06-03 09:16:40: ----------

Mon 2013-06-03 09:16:36: [2903:10] Session 2903; child 10
Mon 2013-06-03 09:16:36: [2903:10] Accepting SMTP connection from [
123.127.189.176:51794] to [118.97.92.178:25]
Mon 2013-06-03 09:16:36: [2903:10] --> 220 mail.indokemika.co.id ESMTP
MDaemon 13.0.4; Mon, 03 Jun 2013 09:16:36 +0700
Mon 2013-06-03 09:16:36: [2903:10] <-- EHLO OutSpam.cofco.com
Mon 2013-06-03 09:16:36: [2903:10] --> 250-mail.indokemika.co.id Hello
OutSpam.cofco.com, pleased to meet you
Mon 2013-06-03 09:16:36: [2903:10] --> 250-ETRN
Mon 2013-06-03 09:16:36: [2903:10] --> 250-AUTH LOGIN CRAM-MD5 PLAIN
Mon 2013-06-03 09:16:36: [2903:10] --> 250-8BITMIME
Mon 2013-06-03 09:16:36: [2903:10] --> 250 SIZE
Mon 2013-06-03 09:16:36: [2903:10] <-- MAIL FROM:<liuya...@cofco.com>
SIZE=118900
Mon 2013-06-03 09:16:36: [2903:10] Performing SPF lookup (cofco.com /
123.127.189.176)
Mon 2013-06-03 09:16:37: [2903:10] *  Result: none; no SPF record in DNS
Mon 2013-06-03 09:16:37: [2903:10] ---- End SPF results
Mon 2013-06-03 09:16:37: [2903:10] --> 250 <liuya...@cofco.com>, Sender ok
Mon 2013-06-03 09:16:37: [2903:10] <-- RCPT TO:<h...@indokemika.co.id>
Mon 2013-06-03 09:16:37: [2903:10] Performing DNS-BL lookup
(123.127.189.176 - connecting IP)
Mon 2013-06-03 09:16:37: [2903:10] *  zen.spamhaus.org - passed
Mon 2013-06-03 09:16:37: [2903:10] *  bl.spamcop.net - passed
Mon 2013-06-03 09:16:38: [2903:10] *  cbl.abuseat.org - passed
Mon 2013-06-03 09:16:38: [2903:10] ---- End DNS-BL results
Mon 2013-06-03 09:16:38: [2903:10] --> 250 <h...@indokemika.co.id>,
Recipient ok
Mon 2013-06-03 09:16:38: [2903:10] <-- DATA
Mon 2013-06-03 09:16:38: [2903:10] Creating temp file (SMTP):
d:\mdaemon\queues\temp\md50000002697.tmp
Mon 2013-06-03 09:16:38: [2903:10] --> 354 Enter mail, end with
<CRLF>.<CRLF>
Mon 2013-06-03 09:16:39: [2903:10] Message size: 118898 bytes
Mon 2013-06-03 09:16:39: [2903:10] Performing DKIM lookup
Mon 2013-06-03 09:16:39: [2903:10] *  File:
d:\mdaemon\queues\temp\md50000002697.tmp
Mon 2013-06-03 09:16:39: [2903:10] *  Message-ID:
2013060310162644271...@cofco.com
Mon 2013-06-03 09:16:40: [2903:10] *  Result: neutral
Mon 2013-06-03 09:16:40: [2903:10] ---- End DKIM results
Mon 2013-06-03 09:16:40: [2903:10] Passing message through AntiVirus (Size:
118898)...
Mon 2013-06-03 09:16:40: [2903:10] *  Message is clean (no viruses found)
Mon 2013-06-03 09:16:40: [2903:10] ---- End AntiVirus results
Mon 2013-06-03 09:16:40: [2903:10] Spam filter scan skipped; message size
(118898) exceeds spam filter configured max size of (102400)
Mon 2013-06-03 09:16:40: [2903:10] Message creation successful:
d:\mdaemon\queues\inbound\md50001327765.msg
Mon 2013-06-03 09:16:40: [2903:10] --> 250 Ok, message saved <Message-ID:
2013060310162644271...@cofco.com>
Mon 2013-06-03 09:16:40: [2903:10] <-- QUIT
Mon 2013-06-03 09:16:40: [2903:10] --> 221 See ya in cyberspace
Mon 2013-06-03 09:16:40: [2903:10] SMTP session successful (Bytes in/out:
119020/434)
Mon 2013-06-03 09:16:40: ----------

Mon 2013-06-03 09:16:36: [2905:11] Session 2905; child 11
Mon 2013-06-03 09:16:36: [2905:11] Accepting SMTP connection from [
219.143.252.48:51797] to [118.97.92.178:25]
Mon 2013-06-03 09:16:36: [2905:11] --> 220 mail.indokemika.co.id ESMTP
MDaemon 13.0.4; Mon, 03 Jun 2013 09:16:36 +0700
Mon 2013-06-03 09:16:46: [2905:11] <-- EHLO OutSpam.cofco.com
Mon 2013-06-03 09:16:46: [2905:11] --> 250-mail.indokemika.co.id Hello
OutSpam.cofco.com, pleased to meet you
Mon 2013-06-03 09:16:46: [2905:11] --> 250-ETRN
Mon 2013-06-03 09:16:46: [2905:11] --> 250-AUTH LOGIN CRAM-MD5 PLAIN
Mon 2013-06-03 09:16:46: [2905:11] --> 250-8BITMIME
Mon 2013-06-03 09:16:46: [2905:11] --> 250 SIZE
Mon 2013-06-03 09:16:46: [2905:11] <-- MAIL FROM:<liuya...@cofco.com>
SIZE=118900
Mon 2013-06-03 09:16:46: [2905:11] Performing SPF lookup (cofco.com /
219.143.252.48)
Mon 2013-06-03 09:16:46: [2905:11] *  Result: none; no SPF record in DNS
Mon 2013-06-03 09:16:46: [2905:11] ---- End SPF results
Mon 2013-06-03 09:16:46: [2905:11] --> 250 <liuya...@cofco.com>, Sender ok
Mon 2013-06-03 09:16:48: [2905:11] <-- RCPT TO:<ly...@indokemika.co.id>
Mon 2013-06-03 09:16:48: [2905:11] Performing DNS-BL lookup (219.143.252.48
- connecting IP)
Mon 2013-06-03 09:16:49: [2905:11] *  zen.spamhaus.org - passed
Mon 2013-06-03 09:16:49: [2905:11] *  bl.spamcop.net - passed
Mon 2013-06-03 09:16:49: [2905:11] *  cbl.abuseat.org - passed
Mon 2013-06-03 09:16:49: [2905:11] ---- End DNS-BL results
Mon 2013-06-03 09:16:49: [2905:11] --> 250 <ly...@indokemika.co.id>,
Recipient ok
Mon 2013-06-03 09:16:49: [2905:11] <-- DATA
Mon 2013-06-03 09:16:49: [2905:11] Creating temp file (SMTP):
d:\mdaemon\queues\temp\md50000002723.tmp
Mon 2013-06-03 09:16:49: [2905:11] --> 354 Enter mail, end with
<CRLF>.<CRLF>
Mon 2013-06-03 09:36:06: [2905:11] Connection timed out!
Mon 2013-06-03 09:36:06: [2905:11] SMTP session terminated (Bytes in/out:
30724/339)
Mon 2013-06-03 09:36:06: ----------

Mon 2013-06-03 09:35:02: [3870:14] Session 3870; child 14
Mon 2013-06-03 09:35:02: [3870:14] Accepting SMTP connection from [
219.143.252.48:53804] to [118.97.92.178:25]
Mon 2013-06-03 09:35:02: [3870:14] --> 220 mail.indokemika.co.id ESMTP
MDaemon 13.0.4; Mon, 03 Jun 2013 09:35:02 +0700
Mon 2013-06-03 09:35:02: [3870:14] <-- EHLO OutSpam.cofco.com
Mon 2013-06-03 09:35:02: [3870:14] --> 250-mail.indokemika.co.id Hello
OutSpam.cofco.com, pleased to meet you
Mon 2013-06-03 09:35:02: [3870:14] --> 250-ETRN
Mon 2013-06-03 09:35:02: [3870:14] --> 250-AUTH LOGIN CRAM-MD5 PLAIN
Mon 2013-06-03 09:35:02: [3870:14] --> 250-8BITMIME
Mon 2013-06-03 09:35:02: [3870:14] --> 250 SIZE
Mon 2013-06-03 09:35:03: [3870:14] <-- MAIL FROM:<liuya...@cofco.com>
SIZE=118900
Mon 2013-06-03 09:35:03: [3870:14] Performing SPF lookup (cofco.com /
219.143.252.48)
Mon 2013-06-03 09:35:03: [3870:14] *  Result: none; no SPF record in DNS
Mon 2013-06-03 09:35:03: [3870:14] ---- End SPF results
Mon 2013-06-03 09:35:03: [3870:14] --> 250 <liuya...@cofco.com>, Sender ok
Mon 2013-06-03 09:35:04: [3870:14] <-- RCPT TO:<li...@indokemika.co.id>
Mon 2013-06-03 09:35:04: [3870:14] Performing DNS-BL lookup (219.143.252.48
- connecting IP)
Mon 2013-06-03 09:35:04: [3870:14] *  zen.spamhaus.org - passed
Mon 2013-06-03 09:35:04: [3870:14] *  bl.spamcop.net - passed
Mon 2013-06-03 09:35:04: [3870:14] *  cbl.abuseat.org - passed
Mon 2013-06-03 09:35:04: [3870:14] ---- End DNS-BL results
Mon 2013-06-03 09:35:04: [3870:14] --> 250 <li...@indokemika.co.id>,
Recipient ok
Mon 2013-06-03 09:35:12: [3870:14] <-- DATA
Mon 2013-06-03 09:35:12: [3870:14] Creating temp file (SMTP):
d:\mdaemon\queues\temp\md50000003699.tmp
Mon 2013-06-03 09:35:12: [3870:14] --> 354 Enter mail, end with
<CRLF>.<CRLF>
Mon 2013-06-03 09:50:17: [3870:14] Connection timed out!
Mon 2013-06-03 09:50:17: [3870:14] SMTP session terminated (Bytes in/out:
8548/339)
Mon 2013-06-03 09:50:17: ----------

Sebagai informasi, email tersebut dikirim ditujukan ke
ly...@indokemika.co.id dan sisanya di cc kan.
Yang jadi pertanyaan saya kenapa log-nya ter-create sendiri2 ya? biasanya
sepengetahuan saya dalam 1 session yang sama.
Dan kenapa IP SMTP Connection-nya bisa beda2 ya Pak? karena IP SMTP
Connection yg berbeda inilah makanya ada yang bisa terima, ada juga yang
gagal (Connection timed out).
Apakah kalau time out saya perbesar akan ada pengaruhnya?

Sebelumnya saya ucapkan terima kasih atas bantuannya.

Rusdi

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