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Re: Can't send mails outside my domain

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  • Alumno Etsii
    2012/10/1 Reindl Harald ... First off, thanks for your fast response! I m not sure what do you mean, are you refering to DNS entries?
    Message 1 of 10 , Oct 1, 2012
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      2012/10/1 Reindl Harald <h.reindl@...>


      Am 01.10.2012 18:17, schrieb Alumno Etsii:
      > Hi list!
      >
      > I've successfully setup my Postfix server with virtual users (using MySQL), let's call this machine 'mail'. I've
      > another server (machine) that relays through 'mail' to send mails, let's call it 'client'. Whenever I try to send
      > an e-mail from 'client' relaying through 'mail', I can do this only if the destination is the same domain that
      > 'mail' is configured to handle. Otherwise, I get an error like this:

      Oct  1 17:08:44 mail postfix/qmgr[2661]: 579AA10042B: from=<root@...>, size=931, nrcpt=1 (queue active)
      Oct  1 17:08:45 mail postfix/smtp[4952]: 579AA10042B: to=<todos.somos.yo@...>,
      relay=devels.es[91.215.158.237]:25, delay=1.3, delays=0.14/0.11/0.83/0.19, dsn=5.0.0, status=bounced (host
      devels.es[91.215.158.237] said: 550-Verification failed for <root@...> 550-The mail server could not
      deliver mail to root@....  The account or domain may not exist, they may be blacklisted, or missing
      the proper dns entries. 550 Sender verify failed (in reply to RCPT TO command))

      so is "root@..." a VALID RCPT on your MX?


      First off, thanks for your fast response!

      I'm not sure what do you mean, are you refering to DNS entries? If so, how can I do to make any *.devels.es host valid? I supposed that 'permit_mynetworks' for senders ('client' would match mynetworks) would make any sender address valid to relay even if it doesn't exist, if I'm wrong, I'd appreciate any clue!

      Thanks in advance!
    • Wietse Venema
      ... The servre complains about the sender address: root@client.devels.es. Does client.devels.es exist? Does root@client.devels.es exist? Wietse
      Message 2 of 10 , Oct 1, 2012
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        Alumno Etsii:
        > Oct 1 17:08:44 mail postfix/qmgr[2661]: 579AA10042B: from=<
        > root@...>, size=931, nrcpt=1 (queue active)

        > Oct 1 17:08:45 mail postfix/smtp[4952]: 579AA10042B: to=<
        > todos.somos.yo@...>, relay=devels.es[91.215.158.237]:25,
        > delay=1.3, delays=0.14/0.11/0.83/0.19, dsn=5.0.0, status=bounced
        > (host devels.es[91.215.158.237] said: 550-Verification failed for
        > <root@...> 550-The mail server could not deliver mail
        > to root@.... The account or domain may not exist,
        > they may be blacklisted, or missing the proper dns entries. 550
        > Sender verify failed (in reply to RCPT TO command))

        The servre complains about the sender address: root@....
        Does client.devels.es exist?
        Does root@... exist?

        Wietse
      • Alumno Etsii
        2012/10/1 Wietse Venema ... client.devels.es exists (and resolves), but root@client.devels.es doesn t exist, and that s how I want it to
        Message 3 of 10 , Oct 1, 2012
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          2012/10/1 Wietse Venema <wietse@...>
          Alumno Etsii:
          > Oct  1 17:08:44 mail postfix/qmgr[2661]: 579AA10042B: from=<
          > root@...>, size=931, nrcpt=1 (queue active)

          > Oct  1 17:08:45 mail postfix/smtp[4952]: 579AA10042B: to=<
          > todos.somos.yo@...>, relay=devels.es[91.215.158.237]:25,
          > delay=1.3, delays=0.14/0.11/0.83/0.19, dsn=5.0.0, status=bounced
          > (host devels.es[91.215.158.237] said: 550-Verification failed for
          > <root@...> 550-The mail server could not deliver mail
          > to root@....  The account or domain may not exist,
          > they may be blacklisted, or missing the proper dns entries. 550
          > Sender verify failed (in reply to RCPT TO command))

          The servre complains about the sender address: root@....
          Does client.devels.es exist?
          Does root@... exist?

                  Wietse

          client.devels.es exists (and resolves), but root@... doesn't exist, and that's how I want it to be, so if I send an e-mail from anything@... it should relay correctly even if that account doesn't exist. That's what I wanted to achieve permitting mynetworks in smtpd_sender_restrictions. Is that even possible?
        • Ralf Hildebrandt
          ... $ host client.devels.es Host client.devels.es not found: 3(NXDOMAIN) -- Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité -
          Message 4 of 10 , Oct 1, 2012
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            * Alumno Etsii <todos.somos.yo@...>:

            > client.devels.es exists (and resolves), but root@... doesn't

            $ host client.devels.es
            Host client.devels.es not found: 3(NXDOMAIN)

            --
            Ralf Hildebrandt
            Geschäftsbereich IT | Abteilung Netzwerk
            Charité - Universitätsmedizin Berlin
            Campus Benjamin Franklin
            Hindenburgdamm 30 | D-12203 Berlin
            Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
            ralf.hildebrandt@... | http://www.charite.de
          • Alumno Etsii
            2012/10/1 Ralf Hildebrandt ... Well, I meant in the local mail server, it actually resolves. Or does it HAVE to exist the DNS
            Message 5 of 10 , Oct 1, 2012
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              2012/10/1 Ralf Hildebrandt <Ralf.Hildebrandt@...>
              * Alumno Etsii <todos.somos.yo@...>:

              > client.devels.es exists (and resolves), but root@... doesn't

              $ host client.devels.es
              Host client.devels.es not found: 3(NXDOMAIN)

              --
              Ralf Hildebrandt
                Geschäftsbereich IT | Abteilung Netzwerk
                Charité - Universitätsmedizin Berlin
                Campus Benjamin Franklin
                Hindenburgdamm 30 | D-12203 Berlin
                Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
                ralf.hildebrandt@... | http://www.charite.de


              Well, I meant in the local 'mail' server, it actually resolves. Or does it HAVE to exist the DNS registry by imperative?
            • Ralf Hildebrandt
              ... If you want to send outside your own domain, yes. Since (almost) everybody checks if the sender domain is valid. After all, one cannot reply otherwise...
              Message 6 of 10 , Oct 1, 2012
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                * Alumno Etsii <todos.somos.yo@...>:
                > 2012/10/1 Ralf Hildebrandt <Ralf.Hildebrandt@...>
                >
                > > * Alumno Etsii <todos.somos.yo@...>:
                > >
                > > > client.devels.es exists (and resolves), but root@...'t
                > >
                > > $ host client.devels.es
                > > Host client.devels.es not found: 3(NXDOMAIN)
                >
                > Well, I meant in the local 'mail' server, it actually resolves. Or does it
                > HAVE to exist the DNS registry by imperative?

                If you want to send outside your own domain, yes. Since (almost) everybody
                checks if the sender domain is valid. After all, one cannot reply
                otherwise...

                --
                Ralf Hildebrandt
                Geschäftsbereich IT | Abteilung Netzwerk
                Charité - Universitätsmedizin Berlin
                Campus Benjamin Franklin
                Hindenburgdamm 30 | D-12203 Berlin
                Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
                ralf.hildebrandt@... | http://www.charite.de
              • Reindl Harald
                ... the RCPT server does sender verification so it connects to the MX of the sender and starts a mail-converastion only if your server says RCPT OK, send
                Message 7 of 10 , Oct 1, 2012
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                  Am 01.10.2012 19:00, schrieb Alumno Etsii:
                  > Well, I meant in the local 'mail' server, it actually resolves. Or does it HAVE to exist the DNS registry by
                  > imperative?

                  the RCPT server does "sender verification"
                  so it connects to the MX of the sender and starts a mail-converastion
                  only if your server says "RCPT OK, send message" the RCPT server
                  will accept your message

                  this is common

                  NEVER EVER send ANY message with a sender for which
                  you do not receive e-mail - never!
                • Alumno Etsii
                  2012/10/1 Reindl Harald ... Unbelievable I didn t realize such a logic thing... Thank you ALL guys, it s working now!
                  Message 8 of 10 , Oct 1, 2012
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                    2012/10/1 Reindl Harald <h.reindl@...>


                    Am 01.10.2012 19:00, schrieb Alumno Etsii:
                    > Well, I meant in the local 'mail' server, it actually resolves. Or does it HAVE to exist the DNS registry by
                    > imperative?

                    the RCPT server does "sender verification"
                    so it connects to the MX of the sender and starts a mail-converastion
                    only if your server says "RCPT OK, send message" the RCPT server
                    will accept your message

                    this is common

                    NEVER EVER send ANY message with a sender for which
                    you do not receive e-mail - never!



                    Unbelievable I didn't realize such a logic thing... Thank you ALL guys, it's working now!
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