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  • #1

    Help request to receive mail from intenet - HOWTO verify?

    Hi forum,

    I have successfully managed to setup Hyperion on Ubuntu 7.10 thanks to your wonderfull install script!! Thanks a lot once more.

    After quite some fiddling and research I am now at a point where sending mail worldwide fully works. (It did not 'out of the box'; I had to install a couple of extra packages, but now this part works)

    However, I am unable to receive mails from the internet.
    I do realize this may not entirely be OX's problem.
    I am behind a firewall, and ISP is blocking most ports, certainly 25.
    To overcome this, I have setup a No-IP account that forwards mail to port 2525.
    Initially I had this fully working on a previous SuSE 10.3 install. Unfortunately I wrecked this working install by testing Hyperion install script, so I can't check anymore.

    So now I'm seeking help on how to check for functionality of receiving mail.
    During testing I find this in mail.log:
    Code:
    May  2 17:16:40 era postfix/smtpd[381]: connect from mail1.no-ip.com[204.16.252.100]
May  2 17:16:41 era postfix/smtpd[381]: lost connection after CONNECT from mail1.no-ip.com[204.16.252.100]
May  2 17:16:41 era postfix/smtpd[381]: disconnect from mail1.no-ip.com[204.16.252.100]
    I'm quite convinced that my portforwarding from 2525 to 25 again on my firewall is properly setup.
    What can I do to find a solution? Could this be due to timing issues? (because of No-IP being in between?)

    Thanks a lot for your help!

    Erwin
    Tags: None
  • #2
    Maybe a check of the connection via telent direct on port 25 and via no-ip.com on port 2525 will show the differences.
    After 1 second shouldn't be a disconnect through a timeout.
    Check also Logs from your firewall.

    Regards

    Matthias

    Comment

    • #3
      Config problem?

      Thanks for your reply;
      As I am not a Postfix guru, I try to do things step by step. I believe you can configure Postfix to listen on multiple ports.
      At the moment I have only listening on port 2525 enabled.
      I have tested manual connection from local lan, both port 25 and after config change, on port 2525. This works perfectly.

      I 'think' port forwarding in my firewall is properly setup.
      The No-IP service has a testing facility with which it tests connection to 'your' mail server on port 2525.
      I just now setup Iptraf.
      When I monitor eth0 (there is only 1 nic) AND at the same time activate the No-IP test, I immediately see the IP address from No-Ip appear in Iptraf:
      Code:
      ┌204.16.252.112:46805                                    =       1            60  S---     eth0
      I have been browsing the Postfix information and found this:
      Code:
      My main.cf contains this line:
---------------------------------
mynetworks = 127.0.0.0/8, 192.168.80.0/24
---------------------------------
      Could this be the reason I will not receive mail from outside?
      Do I have to include the IP address from my router connected to my ISP? If yes, how to solve this with dynamic IP?

      Thanks for your suggestions!

      Erwin

      Comment

      • #4
        narrowing down to solution - nearly there..

        Ok guys..
        We're closing in to the solution.
        Indeed I had a config error in firewall settings.

        So at the moment I can see No-Ip connect to my server behind the firewall, BUT:
        Code:
        May  5 09:59:00 mail postfix/anvil[1644]: statistics: max connection rate 1/60s for (2525:204.16.252.112) at May  5 09:51:48
May  5 09:59:00 mail postfix/anvil[1644]: statistics: max connection count 1 for (2525:204.16.252.112) at May  5 09:51:48
May  5 09:59:00 mail postfix/anvil[1644]: statistics: max cache size 2 at May  5 09:53:48
May  5 09:59:26 mail postfix/smtpd[2414]: connect from www.no-ip.com[204.16.252.112]
May  5 09:59:26 mail postfix/smtpd[2414]: lost connection after CONNECT from www.no-ip.com[204.16.252.112]
May  5 09:59:26 mail postfix/smtpd[2414]: disconnect from www.no-ip.com[204.16.252.112]
        Could this be due to the fact the IP range from No-Ip is not listed in mynetworks (main.cf)?

        The No-Ip test service reports this:
        Code:
        2525: Invalid response (non 220),
        Thanks again!
        Last edited by Guest; 05-05-2008, 09:24 AM.

        Comment

        • #5
          I'm not sure how No-IP test works. My proposal was make a telnet on no-ip.com port 25 wich redirects to your server.

          Regarding mynetworks you should explain how you auth. your users. If auth is on no-ip.com you may use mynetworks.
          For dial-in-users i use permit_sasl_authenticated.

          Regards

          Matthias

          Comment

          • #6
            Further

            Hi Matthias,

            Thanks for answering.
            I have no clue as to auth. users.
            During install I guess a couple of packages didn't make it for on reason or another. I do remember I had to install TLS afterwards... But I have to admit I don't know TLS... So even harder to understand and get thins to work.

            I am also trying to increase logging for Postfix. Perhaps you have tips on this?
            I have added -v to the smtp line in master.cf;
            As I noticed the ip numbers of no-Ip reflector service were appearing in Iptraf, I added both to mynetworks
            This way I get to see more, but still I'm at a loss..

            logging shows this:
            Code:
            May  5 13:30:41 mail postfix/smtpd[3571]: connect from mail1.no-ip.com[204.16.252.100]
May  5 13:30:41 mail postfix/smtpd[3571]: match_list_match: mail1.no-ip.com: no match
May  5 13:30:41 mail postfix/smtpd[3571]: match_list_match: 204.16.252.100: no match
May  5 13:30:41 mail postfix/smtpd[3571]: match_list_match: mail1.no-ip.com: no match
May  5 13:30:41 mail postfix/smtpd[3571]: match_list_match: 204.16.252.100: no match
May  5 13:30:41 mail postfix/smtpd[3571]: match_hostname: mail1.no-ip.com ~? no-ip.com
May  5 13:30:41 mail postfix/smtpd[3571]: match_hostname: mail1.no-ip.com ~? 127.0.0.0/8
May  5 13:30:41 mail postfix/smtpd[3571]: match_hostaddr: 204.16.252.100 ~? 127.0.0.0/8
May  5 13:30:41 mail postfix/smtpd[3571]: match_hostname: mail1.no-ip.com ~? 192.168.80.0/24
May  5 13:30:41 mail postfix/smtpd[3571]: match_hostaddr: 204.16.252.100 ~? 192.168.80.0/24
May  5 13:30:41 mail postfix/smtpd[3571]: match_hostname: mail1.no-ip.com ~? 204.16.252.100
May  5 13:30:41 mail postfix/smtpd[3571]: match_hostaddr: 204.16.252.100 ~? 204.16.252.100
May  5 13:30:41 mail postfix/smtpd[3571]: > mail1.no-ip.com[204.16.252.100]: 220 mail.ipanini.com ESMTP Postfix
May  5 13:30:41 mail postfix/smtpd[3571]: watchdog_pat: 0x8081cc8
May  5 13:30:41 mail postfix/smtpd[3571]: vstream_fflush_some: fd 11 flush 36
May  5 13:30:41 mail postfix/smtpd[3571]: smtp_get: EOF
May  5 13:30:41 mail postfix/smtpd[3571]: match_hostname: mail1.no-ip.com ~? 127.0.0.0/8
May  5 13:30:41 mail postfix/smtpd[3571]: match_hostaddr: 204.16.252.100 ~? 127.0.0.0/8
May  5 13:30:41 mail postfix/smtpd[3571]: match_hostname: mail1.no-ip.com ~? 192.168.80.0/24
May  5 13:30:41 mail postfix/smtpd[3571]: match_hostaddr: 204.16.252.100 ~? 192.168.80.0/24
May  5 13:30:41 mail postfix/smtpd[3571]: match_hostname: mail1.no-ip.com ~? 204.16.252.100
May  5 13:30:41 mail postfix/smtpd[3571]: match_hostaddr: 204.16.252.100 ~? 204.16.252.100
May  5 13:30:41 mail postfix/smtpd[3571]: lost connection after CONNECT from mail1.no-ip.com[204.16.252.100]
May  5 13:30:41 mail postfix/smtpd[3571]: disconnect from mail1.no-ip.com[204.16.252.100]
May  5 13:30:41 mail postfix/smtpd[3571]: master_notify: status 1
            But I keep getting:
            Code:
            mail postfix/smtpd[3571]: lost connection after CONNECT from mail1.no-ip.com[204.16.252.100]
            I also find this in logs:
            Code:
            May  5 12:34:15 mail postfix/trivial-rewrite[23615]: warning: do not list domain ipanini.com in BOTH mydestination and virtual_alias_domains
May  5 12:34:15 mail cyrus/imap[23617]: TLS server engine: No CA file specified. Client side certs may not work
May  5 12:34:15 mail postfix/pipe[23591]: warning: no @ in recipient address: erwin.panen
May  5 12:35:05 mail cyrus/imap[24177]: TLS server engine: No CA file specified. Client side certs may not work
May  5 12:35:28 mail postfix/pipe[23591]: warning: no @ in recipient address: erwin.panen
May  5 12:41:44 mail postfix/smtpd[24910]: warning: database /etc/aliases.db is older than source file /etc/aliases
May  5 12:44:24 mail postfix/smtpd[24976]: warning: database /etc/aliases.db is older than source file /etc/aliases
May  5 12:50:41 mail postfix/smtpd[26196]: warning: database /etc/aliases.db is older than source file /etc/aliases
May  5 12:52:51 mail postfix/smtpd[26252]: warning: database /etc/aliases.db is older than source file /etc/aliases
May  5 12:56:06 mail postfix/smtpd[28089]: warning: database /etc/aliases.db is older than source file /etc/aliases
May  5 13:04:15 mail cyrus/imap[23617]: idle for too long, closing connection
            Thanks for your suggestions!!
            Last edited by Guest; 05-05-2008, 01:12 PM.

            Comment

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