JCOMのバックボーンから当社上位回線のバックボーンへの
経由地点などにボトルネックがあるのかもしれません

WindowsXP等でコマンドプロンプトが使えるようでしたら

pathping zenno.jp

を実行してその結果を見せてください。
このコマンドは通常7分間程度結果の表示に掛かります。

私の自宅から会社にある100円メールサーバーへのpathpingの結果は下記のようになります混雑する時間帯の割には、ほとんど結構問題なく流れている様子がわかります


Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\kenji>pathping mailx.zenno.net

Tracing route to mailx.zenno.net [60.32.107.106]
over a maximum of 30 hops:
0 lw.zenno.net [192.168.3.2]
1 1.3.168.192.in-addr.arpa [192.168.3.1]
2 1.2.168.192.in-addr.arpa [192.168.2.1]
3 218.44.77.11
4 218.44.77.1
5 220.109.209.137
6 i210-225-225-229.s99.a049.ap.plala.or.jp [210.225.225.229]
7 220.111.43.41
8 221.184.4.17
9 210.254.188.153
10 61.207.14.25
11 61.207.14.34
12 221.184.17.106
13 61.207.10.30
14 221.184.7.226
15 221.184.7.112
16 mailx.zenno.net [60.32.107.106]

Computing statistics for 400 seconds...
Source to Here This Node/Link
Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address
0 lw.zenno.net [192.168.3.2]
0/ 100 = 0% |
1 3ms 1/ 100 = 1% 1/ 100 = 1% 1.3.168.192.in-addr.arpa [192.168.3.1]
0/ 100 = 0% |
2 3ms 2/ 100 = 2% 2/ 100 = 2% 1.2.168.192.in-addr.arpa [192.168.2.1]
0/ 100 = 0% |
3 19ms 0/ 100 = 0% 0/ 100 = 0% 218.44.77.11
0/ 100 = 0% |
4 18ms 1/ 100 = 1% 1/ 100 = 1% 218.44.77.1
0/ 100 = 0% |
5 26ms 1/ 100 = 1% 1/ 100 = 1% 220.109.209.137
0/ 100 = 0% |
6 26ms 0/ 100 = 0% 0/ 100 = 0% i210-225-225-229.s99.a049.ap.plala.or.jp [210.225.225.229]
0/ 100 = 0% |
7 26ms 0/ 100 = 0% 0/ 100 = 0% 220.111.43.41
0/ 100 = 0% |
8 26ms 0/ 100 = 0% 0/ 100 = 0% 221.184.4.17
0/ 100 = 0% |
9 27ms 2/ 100 = 2% 2/ 100 = 2% 210.254.188.153
0/ 100 = 0% |
10 34ms 2/ 100 = 2% 2/ 100 = 2% 61.207.14.25
0/ 100 = 0% |
11 33ms 2/ 100 = 2% 2/ 100 = 2% 61.207.14.34
0/ 100 = 0% |
12 36ms 2/ 100 = 2% 2/ 100 = 2% 221.184.17.106
0/ 100 = 0% |
13 33ms 1/ 100 = 1% 1/ 100 = 1% 61.207.10.30
0/ 100 = 0% |
14 35ms 0/ 100 = 0% 0/ 100 = 0% 221.184.7.226
0/ 100 = 0% |
15 35ms 0/ 100 = 0% 0/ 100 = 0% 221.184.7.112
0/ 100 = 0% |
16 36ms 0/ 100 = 0% 0/ 100 = 0% mailx.zenno.net [60.32.107.106]

Trace complete.

C:\Documents and Settings\kenji>

返信する