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Thread: [SOLVED] Cannot send email from dynamic remote network

  1. #1
    drsprite is offline Member
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    Exclamation [SOLVED] Cannot send email from dynamic remote network

    I'm hoping someone can help me out. I've been banging my head against the wall for a few hours now. I'm a bit of a newbie, so please bear with me!

    I have Zimbra Open Source Edition 6.0.8 32-bit on CentOS 5.5.

    Let me preface by saying that Zimbra works great for me. I think it's because my network is static, and I have my IPs as a trusted MTA network.

    My problem is that I have a user who is on a dynamic remote network from my Zimbra server. He's a home user, and his cable modem is DHCP. He can receive emails all day long from my server, but when he goes to send them, his messages are being dropped instantly from the server.

    In Zimbra Admin > Global Settings > MTA; I have Enable Auth & TLS Auth Only enabled.

    Here's what I'm seeing in the log files when I try and send an email.

    Code:
    Sep 14 22:08:25 mail postfix/smtpd[4378]: connect from DHCP.comcast.net[71.192.x.x]
    Sep 14 22:08:26 mail postfix/smtpd[4378]: 0E9EB2379C0: client=DHCP.comcast.net[71.192.x.x]
    Sep 14 22:08:26 mail postfix/cleanup[4393]: 0E9EB2379C0: message-id=<20100915020826.0E9EB2379C0@mail.MYSERVER.com>
    Sep 14 22:08:26 mail postfix/qmgr[1330]: 0E9EB2379C0: from=, size=726, nrcpt=1 (queue active)
    Sep 14 22:08:26 mail postfix/smtpd[4378]: disconnect from .comcast.net[71.192.x.x]
    Sep 14 22:08:26 mail amavis[22980]: (22980-01) ESMTP::10024 /opt/zimbra/data/amavisd/tmp/amavis-20100914T220826-22980:  ->  SIZE=726 BODY=8BITMIME Received: from mail.MYSERVER.com ([127.0.0.1]) by localhost (mail.MYSERVER.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP for ; Tue, 14 Sep 2010 22:08:26 -0400 (EDT)
    Sep 14 22:08:26 mail amavis[22980]: (22980-01) Checking: nS8lGTw53p6v [71.192.144.93]  -> 
    Sep 14 22:08:26 mail clamd[9757]: SelfCheck: Database status OK.
    Sep 14 22:08:29 mail amavis[22980]: (22980-01) Blocked SPAM, [71.192.x.x] [71.192.x.x]  -> , Message-ID: <20100915020826.0E9EB2379C0@mail.MYSERVER.com>, mail_id: nS8lGTw53p6v, Hits: 18.791, size: 726, 3306 ms
    Sep 14 22:08:29 mail amavis[22980]: (22980-01) extra modules loaded: /opt/zimbra/zimbramon/lib/i386-linux-thread-multi/auto/Net/SSLeay/autosplit.ix, /opt/zimbra/zimbramon/lib/i386-linux-thread-multi/auto/Net/SSLeay/randomize.al, IO/Socket/SSL.pm, Net/LDAP/Extension.pm, Net/SSLeay.pm
    Sep 14 22:08:29 mail postfix/smtp[4396]: 0E9EB2379C0: to=, relay=127.0.0.1[127.0.0.1]:10024, delay=3.5, delays=0.17/0.02/0.05/3.3, dsn=2.7.0, status=sent (250 2.7.0 Ok, discarded, id=22980-01 - SPAM)
    Sep 14 22:08:29 mail postfix/qmgr[1330]: 0E9EB2379C0: removed
    Earlier when we were trying, we'd get an undeliverable which shows the reason "554 5.7.1 : Relay Access Denied". But now all we see are those log file entries.

    So, here's an overview of what I'm seeing:
    • Everything works fine for me. I am on an "MTA Trusted Network"
    • He is on an external network with a DHCP cable modem
    • He cannot send email to internal nor external email addresses.
    • If I put my known-working credentials in on his Outlook, I'm also getting the same error message above.
    • He can send email using the webmail function, so I know the MTA is working.


    Can anyone help?

    Thanks!

  2. #2
    y@w's Avatar
    y@w
    y@w is offline Moderator
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    You'll need to make sure the user is authenticating to the SMTP server to avoid the relay access denied errors.

    As far as marking it as spam, have a look at this wiki article: Spamassassin postfix authenticated users - Zimbra :: Wiki

  3. #3
    y@w's Avatar
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    Also, welcome to the forums

  4. #4
    drsprite is offline Member
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    Thanks y@w! I have them authenticating through Outlook account properties, and when I send an Outlook test message it says successful. So I think now my problem is the messages getting killed as spam.

    I'll rtfm that link you sent me and see if it helps! Will let you know!

  5. #5
    drsprite is offline Member
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    I think I may have created more problems? After going through the instructions outlined in the Wiki, I am still seeing dropped messages in the exact manner as my original post.

    So I decided I'd restart Zimbra, and now I am seeing this:

    Code:
    [zimbra@mail drsprite]$ zmcontrol restart
    Host mail.MYSERVER.com
            Stopping stats...Done.
            Stopping mta...Done.
            Stopping spell...Done.
            Stopping snmp...Done.
            Stopping archiving...Done.
            Stopping antivirus...Done.
            Stopping antispam...Done.
            Stopping imapproxy...Done.
            Stopping memcached...Done.
            Stopping mailbox...Done.
            Stopping logger...Done.
            Stopping ldap...Done.
    Host mail.MYSERVER.com
            Starting ldap...Done.
            Starting logger...Done.
            Starting mailbox...Done.
            Starting antispam...Done.
            Starting antivirus...Failed.
    Starting zmmtaconfig...zmmtaconfig is already running.
    Starting amavisd...amavisd is already running.
    Starting freshclam...done.
    Starting clamd...connect(): Connection refused
    failed.
    
    
            Starting snmp...Done.
            Starting spell...Done.
            Starting mta...Done.
            Starting stats...Done.

    Any additional ideas?

    Thanks!

  6. #6
    phoenix is online now Zimbra Consultant & Moderator
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    Your remote user should be using Port 587 as the Submission port (that will also require him to authenticate) and not Port 25, is that the case?

    What are the exact changes you made to your server before the restart? What errors do you see in the log files?
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  7. #7
    drsprite is offline Member
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    The errors in the log files I'm seeing are in my original post in the CODE section, and the changes I made modified the headers and spamassassin as outlined in the Zimbra wiki that y@w gave me.

    I believe I have tried port 587 and that was failing all together. I will try it again now and will confirm.

  8. #8
    drsprite is offline Member
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    Confirmed when I try port 587 with SMTP requires authentication setup in outlook, I see this in in /var/log/zimbra.log :

    Sep 16 10:58:52 mail postfix/smtpd[32394]: lost connection after EHLO from

  9. #9
    phoenix is online now Zimbra Consultant & Moderator
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    Quote Originally Posted by drsprite View Post
    The errors in the log files I'm seeing are in my original post in the CODE section
    I actually meant for the restart problem you've just posted or is that now working? The errors you posted initially show that the user is sending spam, the score from amavisd is "Hits: 18.791". Is there any possibility that's the case or that you can get hold of the message they were trying to send to you and view it's content? Have you also checked the IP of that email to see if it's actually on any known blacklist?
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  10. #10
    drsprite is offline Member
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    Oh, I see. I misunderstood you.

    Shouldn't be on any known Blacklist since it's just his home comcast.net cable modem account.

    The message content is the simple "Test My Setup" from within Outlook account setup properties - so a basic Microsoft test message

    The Restart Problem hasn't been resolved yet either. I'm scanning log files now, but not sure I see what happened...

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