Hi, There's the SonicWall FW in between. What should I look for?I have the LAN MTU = 1420 on the RedHat server matching that of the ISP router.
Regards,Fred On Wed, 10/31/2012 11:47 PM, Ralf Hildebrandt <r...@sys4.de> wrote: > * Fred Ho <f...@fredho.net>: > > Hi, > > > I am running Postfix version 2.5.6 on RedHat 4 and is experiencing > > periodic duplicated mails.The RedHat mailserver is the mailhub > > receiving incoming mails from the ISP and forward mails to the > > internal mail server. > Occasionally, users are complaining receiving > > duplicated mails on the same day with 1-2 hours apart.Here's one of > > the snipped log entries on the same incoming mails being delivered > > twice: > > CISCO PIX/ASA in your mail path? > > > Oct 31 10:15:16 mailgate2 postfix/smtpd[9647]: connect from > > ttsenmta2.ttasia.com[210.17.183.8] > > Oct 31 10:15:17 mailgate2 postfix/smtpd[9647]: 4803D7F20: > > client=ttsenmta2.ttasia.com[210.17.183.8] > > Oct 31 10:15:17 mailgate2 postfix/cleanup[9648]: 4803D7F20: > > message-id=<002601cdb70d$8e5363e0$aafa2ba0$@com.tw> > > Oct 31 13:04:23 mailgate2 postfix/qmgr[4869]: 4803D7F20: > > from=<v...@otogarment.com>, size=595890, nrcpt=3 (queue active) > > Oct 31 13:04:23 mailgate2 postfix/smtp[10206]: 4803D7F20: > > to=<i...@ss-intl.com>, relay=192.168.1.21[192.168.1.21]:25, delay=10147, > > delays=10146/0/0/0.3, dsn=2.0.0, status=sent (250 Mail queued for delivery) > > Oct 31 13:04:23 mailgate2 postfix/smtp[10206]: 4803D7F20: > > to=<rick...@ss-intl.com>, relay=192.168.1.21[192.168.1.21]:25, delay=10147, > > delays=10146/0/0/0.3, dsn=2.0.0, status=sent (250 Mail queued for delivery) > > Oct 31 13:04:23 mailgate2 postfix/smtp[10206]: 4803D7F20: > > to=<sherry...@ss-intl.com>, relay=192.168.1.21[192.168.1.21]:25, > > delay=10147, delays=10146/0/0/0.3, dsn=2.0.0, status=sent (250 Mail queued > > for delivery) > > Oct 31 13:04:23 mailgate2 postfix/qmgr[4869]: 4803D7F20: removed > > > > Oct 31 10:30:23 mailgate2 postfix/smtpd[9688]: connect from > > ttsenmta2.ttasia.com[210.17.183.8] > > Oct 31 10:30:23 mailgate2 postfix/smtpd[9688]: F097C7F1F: > > client=ttsenmta2.ttasia.com[210.17.183.8] > > Oct 31 10:30:24 mailgate2 postfix/cleanup[9689]: F097C7F1F: > > message-id=<002601cdb70d$8e5363e0$aafa2ba0$@com.tw> > > Oct 31 10:30:26 mailgate2 postfix/qmgr[4869]: F097C7F1F: > > from=<v...@otogarment.com>, size=595890, nrcpt=3 (queue active) > > Oct 31 10:30:26 mailgate2 postfix/smtpd[9688]: disconnect from > > ttsenmta2.ttasia.com[210.17.183.8] > > Oct 31 10:30:26 mailgate2 postfix/smtp[9685]: F097C7F1F: > > to=<i...@ss-intl.com>, relay=192.168.1.21[192.168.1.21]:25, delay=2.6, > > delays=2.3/0/0/0.3, dsn=2.0.0, status=sent (250 Mail queued for delivery) > > Oct 31 10:30:26 mailgate2 postfix/smtp[9685]: F097C7F1F: > > to=<rick...@ss-intl.com>, relay=192.168.1.21[192.168.1.21]:25, delay=2.6, > > delays=2.3/0/0/0.3, dsn=2.0.0, status=sent (250 Mail queued for delivery) > > Oct 31 10:30:26 mailgate2 postfix/smtp[9685]: F097C7F1F: > > to=<sherry...@ss-intl.com>, relay=192.168.1.21[192.168.1.21]:25, delay=2.6, > > delays=2.3/0/0/0.3, dsn=2.0.0, status=sent (250 Mail queued for delivery) > > Oct 31 10:30:26 mailgate2 postfix/qmgr[4869]: F097C7F1F: removed > > > > Can someone explain why there's a delay in delivery at 10:15:17 until > > 13:04? > > The ISP said they didn't receive the 250 OK after end of DATA and hence > > retry later at 10:30 which was delivered immediately. > > -- > [*] sys4 AG > > http://sys4.de, +49 (89) 30 90 46 64 > Franziskanerstraße 15, 81669 München > > Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 > Vorstand: Patrick Ben Koetter, Axel von der Ohe, Marc Schiffbauer > Aufsichtsratsvorsitzender: Joerg Heidrich > > >
