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肉腳版 / mail server無法收取特定網域的信件
« 於: 2010-01-14 10:26 »
這是我公司的一個大客戶的信箱
昨天開始突然他寄給我們的e-mail ,我們都收不到
檢查maillog發現紀錄就只有像是下面這樣,connect然後馬上disconnect ......
Jan 14 05:40:53 mail postfix/smtpd[6374]: connect from unknown[121.254.228.5]
Jan 14 05:40:53 mail postfix/smtpd[6374]: disconnect from unknown[121.254.228.5]
Jan 14 06:15:07 mail postfix/smtpd[7579]: connect from unknown[121.254.228.5]
Jan 14 06:15:07 mail postfix/smtpd[7579]: disconnect from unknown[121.254.228.5]
對方沒有技術人員,mail server是託管在韓國某系統業者下面
我個人是覺得像是網路有問題,可是這樣的紀錄實在太簡單
用大封包去ping,看起來也沒問題
PING 121.254.228.5 (121.254.228.5) 200(228) bytes of data.
208 bytes from 121.254.228.5: icmp_seq=1 ttl=50 time=86.4 ms
208 bytes from 121.254.228.5: icmp_seq=2 ttl=50 time=85.4 ms
208 bytes from 121.254.228.5: icmp_seq=3 ttl=50 time=85.7 ms
208 bytes from 121.254.228.5: icmp_seq=4 ttl=50 time=84.6 ms
208 bytes from 121.254.228.5: icmp_seq=5 ttl=50 time=98.8 ms
208 bytes from 121.254.228.5: icmp_seq=6 ttl=50 time=84.7 ms
208 bytes from 121.254.228.5: icmp_seq=7 ttl=50 time=85.3 ms
208 bytes from 121.254.228.5: icmp_seq=8 ttl=50 time=84.7 ms
--- 121.254.228.5 ping statistics ---
8 packets transmitted, 8 received, 0% packet loss, time 7072ms
rtt min/avg/max/mdev = 84.633/86.983/98.811/4.518 ms
麻煩大家幫我想想,下一步該如何釐清問題 ?
昨天開始突然他寄給我們的e-mail ,我們都收不到
檢查maillog發現紀錄就只有像是下面這樣,connect然後馬上disconnect ......
Jan 14 05:40:53 mail postfix/smtpd[6374]: connect from unknown[121.254.228.5]
Jan 14 05:40:53 mail postfix/smtpd[6374]: disconnect from unknown[121.254.228.5]
Jan 14 06:15:07 mail postfix/smtpd[7579]: connect from unknown[121.254.228.5]
Jan 14 06:15:07 mail postfix/smtpd[7579]: disconnect from unknown[121.254.228.5]
對方沒有技術人員,mail server是託管在韓國某系統業者下面
我個人是覺得像是網路有問題,可是這樣的紀錄實在太簡單
用大封包去ping,看起來也沒問題
PING 121.254.228.5 (121.254.228.5) 200(228) bytes of data.
208 bytes from 121.254.228.5: icmp_seq=1 ttl=50 time=86.4 ms
208 bytes from 121.254.228.5: icmp_seq=2 ttl=50 time=85.4 ms
208 bytes from 121.254.228.5: icmp_seq=3 ttl=50 time=85.7 ms
208 bytes from 121.254.228.5: icmp_seq=4 ttl=50 time=84.6 ms
208 bytes from 121.254.228.5: icmp_seq=5 ttl=50 time=98.8 ms
208 bytes from 121.254.228.5: icmp_seq=6 ttl=50 time=84.7 ms
208 bytes from 121.254.228.5: icmp_seq=7 ttl=50 time=85.3 ms
208 bytes from 121.254.228.5: icmp_seq=8 ttl=50 time=84.7 ms
--- 121.254.228.5 ping statistics ---
8 packets transmitted, 8 received, 0% packet loss, time 7072ms
rtt min/avg/max/mdev = 84.633/86.983/98.811/4.518 ms
麻煩大家幫我想想,下一步該如何釐清問題 ?