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Re: Can't send mails but I can receive

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  • Jan P. Kessler
    ... Something is wrong with your DNS resolution. freenet.de[62.104.23.42] is not the correct MX for @freenet.de: # host -t mx freenet.de freenet.de mail is
    Message 1 of 12 , Sep 12, 2013
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      > > Sep 12 04:57:06 nudin1 postfix/smtp[29110]: connect to
      > > freenet.de[62.104.23.42]:25: Connection refused
      >
      > connection refused is a network problem, probably a firewall block.
      > Perhaps your ISP doesn't allow you to run a mail server?

      Something is wrong with your DNS resolution. freenet.de[62.104.23.42] is
      not the correct MX for @...:

      # host -t mx freenet.de
      freenet.de mail is handled by 1 mx.freenet.de.

      # host mx.freenet.de
      mx.freenet.de has address 195.4.92.211
      mx.freenet.de has address 195.4.92.9
      mx.freenet.de has IPv6 address 2001:748:100:40::8:111
      mx.freenet.de has IPv6 address 2001:748:100:40::8:110
    • Wietse Venema
      ... Well spotted. Apparently he uses A lookup instead of MX lookup. This is a definite no-no for email. % dig a freenet.de ... freenet.de. 300
      Message 2 of 12 , Sep 12, 2013
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        Jan P. Kessler:
        > > > Sep 12 04:57:06 nudin1 postfix/smtp[29110]: connect to
        > > > freenet.de[62.104.23.42]:25: Connection refused
        > >
        > > connection refused is a network problem, probably a firewall block.
        > > Perhaps your ISP doesn't allow you to run a mail server?
        >
        > Something is wrong with your DNS resolution. freenet.de[62.104.23.42] is
        > not the correct MX for @...:

        Well spotted. Apparently he uses A lookup instead of MX lookup.
        This is a definite no-no for email.

        % dig a freenet.de
        ...
        freenet.de. 300 IN A 62.104.23.42

        Wietse
      • Chris
        Hello Jan, Wietse, thank you very much - so it s not about Postfix but about my DNS setup. I ll change that in my zone settings. Hope it works after this. :)
        Message 3 of 12 , Sep 12, 2013
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          Hello Jan, Wietse,

          thank you very much - so it's not about Postfix but about my DNS setup.

          I'll change that in my zone settings.

          Hope it works after this. :)

          Bye, Chris


          Am 13.09.2013 01:16, schrieb Jan P. Kessler:
          >
          >>> Sep 12 04:57:06 nudin1 postfix/smtp[29110]: connect to
          >>> freenet.de[62.104.23.42]:25: Connection refused
          >>
          >> connection refused is a network problem, probably a firewall block.
          >> Perhaps your ISP doesn't allow you to run a mail server?
          >
          > Something is wrong with your DNS resolution. freenet.de[62.104.23.42] is
          > not the correct MX for @...:
          >
          > # host -t mx freenet.de
          > freenet.de mail is handled by 1 mx.freenet.de.
          >
          > # host mx.freenet.de
          > mx.freenet.de has address 195.4.92.211
          > mx.freenet.de has address 195.4.92.9
          > mx.freenet.de has IPv6 address 2001:748:100:40::8:111
          > mx.freenet.de has IPv6 address 2001:748:100:40::8:110
          >
          >
          >
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