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warning: network_biopair_interop: error writing 37 bytes to the network: Broken pipe

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  • Rishi
    Hello I ve been receiving lots of errors in mail.log Mar 7 11:49:47 mail postfix/smtpd[92520]: warning: network_biopair_interop: error writing 37 bytes to the
    Message 1 of 5 , Mar 7, 2013
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      Hello 

      I've been receiving lots of errors in mail.log 

      Mar  7 11:49:47 mail postfix/smtpd[92520]: warning: network_biopair_interop: error writing 37 bytes to the network: Broken pipe 
      Mar  7 11:50:13 mail postfix/smtpd[92555]: warning: network_biopair_interop: error writing 27 bytes to the network: Broken pipe 
      Mar  7 11:50:56 mail postfix/smtpd[94257]: warning: network_biopair_interop: error writing 37 bytes to the network: Broken pipe 
      Mar  7 11:51:13 mail postfix/smtpd[92520]: warning: network_biopair_interop: error writing 27 bytes to the network: Broken pipe 
      Mar  7 11:51:57 mail postfix/smtpd[92615]: warning: network_biopair_interop: error writing 37 bytes to the network: Broken pipe 
      Mar  7 11:52:24 mail postfix/smtpd[92555]: warning: network_biopair_interop: error writing 27 bytes to the network: Broken pipe 
      Mar  7 11:52:31 mail postfix/smtpd[92555]: warning: network_biopair_interop: error writing 37 bytes to the network: Broken pipe 
      Mar  7 11:52:32 mail postfix/smtpd[92629]: warning: network_biopair_interop: error writing 37 bytes to the network: Broken pipe 
      Mar  7 11:53:08 mail postfix/smtpd[94255]: warning: network_biopair_interop: error writing 27 bytes to the network: Broken pipe 


      Any idea what this means? 

      The customer has been reporting delayed delivery of email. 

      Any tips on what I should look out for in the configuration? 

      Rishi 
    • Lima Union
      Maybe this helps (just googled it...) http://tech.groups.yahoo.com/group/postfix-users/message/273461 Regards.
      Message 2 of 5 , Mar 7, 2013
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        Maybe this helps (just googled it...)

        http://tech.groups.yahoo.com/group/postfix-users/message/273461

        Regards.

        On Thu, Mar 7, 2013 at 1:40 PM, Rishi <rishigangoly@...> wrote:
        > Hello
        >
        > I've been receiving lots of errors in mail.log
        >
        > Mar 7 11:49:47 mail postfix/smtpd[92520]: warning: network_biopair_interop:
        > error writing 37 bytes to the network: Broken pipe
        > Mar 7 11:50:13 mail postfix/smtpd[92555]: warning: network_biopair_interop:
        > error writing 27 bytes to the network: Broken pipe
        > Mar 7 11:50:56 mail postfix/smtpd[94257]: warning: network_biopair_interop:
        > error writing 37 bytes to the network: Broken pipe
        > Mar 7 11:51:13 mail postfix/smtpd[92520]: warning: network_biopair_interop:
        > error writing 27 bytes to the network: Broken pipe
        > Mar 7 11:51:57 mail postfix/smtpd[92615]: warning: network_biopair_interop:
        > error writing 37 bytes to the network: Broken pipe
        > Mar 7 11:52:24 mail postfix/smtpd[92555]: warning: network_biopair_interop:
        > error writing 27 bytes to the network: Broken pipe
        > Mar 7 11:52:31 mail postfix/smtpd[92555]: warning: network_biopair_interop:
        > error writing 37 bytes to the network: Broken pipe
        > Mar 7 11:52:32 mail postfix/smtpd[92629]: warning: network_biopair_interop:
        > error writing 37 bytes to the network: Broken pipe
        > Mar 7 11:53:08 mail postfix/smtpd[94255]: warning: network_biopair_interop:
        > error writing 27 bytes to the network: Broken pipe
        >
        >
        > Any idea what this means?
        >
        > The customer has been reporting delayed delivery of email.
        >
        > Any tips on what I should look out for in the configuration?
        >
        > Rishi
      • Noel Jones
        ... This happens when a client sending you mail establishes a TLS connection, and then drops the connection before postfix can respond. ... The above error ...
        Message 3 of 5 , Mar 7, 2013
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          On 3/7/2013 10:40 AM, Rishi wrote:
          > Hello
          >
          > I've been receiving lots of errors in mail.log
          >
          > Mar 7 11:49:47 mail postfix/smtpd[92520]: warning:
          > network_biopair_interop: error writing 37 bytes to the network:
          > Broken pipe
          > Mar 7 11:50:13 mail postfix/smtpd[92555]: warning:
          > network_biopair_interop: error writing 27 bytes to the network:
          > Broken pipe
          > Mar 7 11:50:56 mail postfix/smtpd[94257]: warning:
          > network_biopair_interop: error writing 37 bytes to the network:
          > Broken pipe
          > Mar 7 11:51:13 mail postfix/smtpd[92520]: warning:
          > network_biopair_interop: error writing 27 bytes to the network:
          > Broken pipe
          > Mar 7 11:51:57 mail postfix/smtpd[92615]: warning:
          > network_biopair_interop: error writing 37 bytes to the network:
          > Broken pipe
          > Mar 7 11:52:24 mail postfix/smtpd[92555]: warning:
          > network_biopair_interop: error writing 27 bytes to the network:
          > Broken pipe
          > Mar 7 11:52:31 mail postfix/smtpd[92555]: warning:
          > network_biopair_interop: error writing 37 bytes to the network:
          > Broken pipe
          > Mar 7 11:52:32 mail postfix/smtpd[92629]: warning:
          > network_biopair_interop: error writing 37 bytes to the network:
          > Broken pipe
          > Mar 7 11:53:08 mail postfix/smtpd[94255]: warning:
          > network_biopair_interop: error writing 27 bytes to the network:
          > Broken pipe
          >
          >
          > Any idea what this means?


          This happens when a client sending you mail establishes a TLS
          connection, and then drops the connection before postfix can respond.


          >
          > The customer has been reporting delayed delivery of email.

          The above error

          >
          > Any tips on what I should look out for in the configuration?


          First examine your logs to see which clients this message is
          associated with by searching for the proceeding message from the
          same smtpd process.

          Sometimes spam bots will give this message; those can be ignored.

          If it's from just one or two non-spam clients, they may have a
          broken TLS implementation. You can disable TLS for specific clients
          with smtpd_discard_ehlo_keyword_address_maps.
          http://www.postfix.org/postconf.5.html#smtpd_discard_ehlo_keyword_address_maps




          -- Noel Jones
        • Rishi
          ... Not sure if this helps, but I just ran a quick command on the logs. bzgrep network_biopair_interop mail.log.?.bz2 | wc -l And got this number: 9111 Is that
          Message 4 of 5 , Mar 7, 2013
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            >> Any tips on what I should look out for in the configuration?
            >
            > First examine your logs to see which clients this message is
            > associated with by searching for the proceeding message from the
            > same smtpd process.


            Not sure if this helps, but I just ran a quick command on the logs.

            bzgrep network_biopair_interop mail.log.?.bz2 | wc -l

            And got this number: 9111

            Is that too high?

            These are from logs dated since Feb 25th till to March 5th
          • Noel Jones
            ... The number is meaningless. You need to check the logs and find which clients are causing this error: if it looks like a spammer, just ignore it (or
            Message 5 of 5 , Mar 7, 2013
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              On 3/7/2013 12:03 PM, Rishi wrote:
              >>> Any tips on what I should look out for in the configuration?
              >>
              >> First examine your logs to see which clients this message is
              >> associated with by searching for the proceeding message from the
              >> same smtpd process.
              >
              >
              > Not sure if this helps, but I just ran a quick command on the logs.
              >
              > bzgrep network_biopair_interop mail.log.?.bz2 | wc -l
              >
              > And got this number: 9111
              >
              > Is that too high?
              >
              > These are from logs dated since Feb 25th till to March 5th
              >
              >

              The number is meaningless. You need to check the logs and find
              which clients are causing this error: if it looks like a spammer,
              just ignore it (or firewall them); if it's some legit client,
              disable TLS for that client.

              And schedule a postfix upgrade while you're at it.




              -- Noel Jones
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