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Thread: backscatter?

  1. #1
    testnburn is offline Junior Member
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    Default backscatter?

    hi everyone
    weve recently deployed zimbra to replace our old mail system, all went well
    though this past week, weve noticed an incredibly large number of mails getting deffered, although 90% is invalid mail.. it somehow affects incoming mail as weve received reports that it took hours to receive certain important mails..

    here's part of the zimbra.log :
    Apr 23 10:47:02 mailer postfix/smtp[26830]: D77482B7000B: to=<info@radio-info.ru>, relay=mail.radioinfo.ru[87.224.128.72]:25, delay=478, delays=0.12/348/51/78, dsn=4.0.0, status=deferred (host mail.radioinfo.ru[87.224.128.72] said: 478 severstroy2004@dinastia.ru no relay available (in reply to MAIL FROM command))
    Apr 23 10:47:02 mailer postfix/smtp[20505]: 8421E2B7001F: to=<info@remodel-info.ru>, relay=mx1.leaderhost.ru[194.176.118.10]:25, delay=464, delays=0.25/434/30/0.42, dsn=5.0.0, status=bounced (host mx1.leaderhost.ru[194.176.118.10] said: 550 sorry, no mailbox here by that name (#5.1.1) (in reply to RCPT TO command))
    Apr 23 10:47:03 mailer postfix/smtp[14179]: connect to remodomo.ru[217.16.28.65]:25: Connection refused
    Apr 23 10:47:03 mailer postfix/smtp[14179]: 8421E2B7001F: to=<info@remodomo.ru>, relay=none, delay=465, delays=0.25/437/28/0, dsn=4.4.1, status=deferred (connect to remodomo.ru[217.16.28.65]:25: Connection refused)
    Apr 23 10:47:03 mailer postfix/smtp[12390]: connect to mx1.masterhost.ru[217.16.16.81]:25: Connection timed out
    Apr 23 10:47:03 mailer postfix/smtp[12390]: 855992B70020: to=<info@remnev.ru>, relay=none, delay=465, delays=0.14/408/57/0, dsn=4.4.1, status=deferred (connect to mx1.masterhost.ru[217.16.16.81]:25: Connection timed out)

    searched the forum, found hits re: backscatter, but still having the same problem.
    any help is greatly appreciated!

  2. #2
    testnburn is offline Junior Member
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    additional logs from zimbra.log

    Apr 23 12:01:12 mailer postfix/smtp[28693]: C91852B7009D: to=<info@ruletkaru.ru>, relay=none, delay=3997, delays=3370/534/93/0, dsn=4.4.1, status=deferred (connect to ruletkaru.ru[194.85.61.78]:25: Connection timed out)
    Apr 23 12:01:12 mailer postfix/smtp[28714]: 06FF02B70039: to=<info@novyeoboi.ru>, relay=mx.yandex.ru[213.180.204.89]:25, delay=1599, delays=972/596/28/2.4, dsn=5.7.1, status=bounced (host mx.yandex.ru[213.180.204.89] said: 554 5.7.1 Message rejected under suspicion of SPAM (in reply to end of DATA command))
    Apr 23 12:01:12 mailer postfix/smtp[28717]: C05F42B70115: to=<info@olimpokna.ru>, relay=static-240-164.domolink.elcom.ru[84.53.240.164]:25, delay=1060, delays=433/546/73/7.1, dsn=5.0.0, status=bounced (host static-240-164.domolink.elcom.ru[84.53.240.164] said: 554 Sorry, message looks like SPAM to me (in reply to end of DATA command))
    Apr 23 12:01:12 mailer postfix/smtp[28456]: C05F42B70115: to=<info@olimpstar.ru>, relay=none, delay=1061, delays=433/567/60/0, dsn=4.4.1, status=deferred (connect to nmx11.masterhost.ru[90.156.155.115]:25: Connection timed out)
    Apr 23 12:01:12 mailer postfix/smtp[28526]: 06FF02B70039: to=<info@novyi-urengoy.ru>, relay=none, delay=1600, delays=972/606/22/0, dsn=5.4.4, status=bounced (Host or domain name not found. Name service error for name=novyi-urengoy.ru type=A: Host not found)
    Apr 23 12:01:12 mailer postfix/smtpd[5711]: connect from unknown[128.1.15.2]
    Apr 23 12:01:12 mailer postfix/smtp[28370]: D5A342B70056: to=<info@startele.ru>, relay=none, delay=1663, delays=1036/584/42/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=startele.ru type=MX: Host not found, try again)
    Apr 23 12:01:12 mailer postfix/smtp[28515]: D5A342B70056: to=<info@startender.ru>, relay=mail.startender.ru[82.146.59.142]:25, delay=1664, delays=1036/585/42/0.42, dsn=5.7.1, status=bounced (host mail.startender.ru[82.146.59.142] said: 550 5.7.1 <info@startender.ru>... Relaying denied. IP name lookup failed [121.58.195.147] (in reply to RCPT TO command))

  3. #3
    uxbod's Avatar
    uxbod is offline Moderator
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    Have a read through Postfix Backscatter Howto for some ways of blocking.

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