Re: System I/O error (in reply to end of DATA command) for LMTP delivery

Stephen Ingram <sbingram@xxxxxxxxx> · Fri, 1 Jun 2018 09:58:19 -0700

Ken-
That could be. I noticed that the SELinux policy updated on the server as well and Redhat might have changed something that is not allowing Cyrus to write there?? It is able to write the Kerberos credential cache there though. I thought it wrote everything else to /var/lib/imap.

I don't see anything in the cyrus syslog besides the postfix server logging into the cyrus server successfully. Is there a way to increase the debugging?

Steve

On Fri, Jun 1, 2018 at 9:54 AM, Ken Murchison <murch@xxxxxxxxxxxx> wrote:

    OTH, my guess is that Cyrus is failing to create the tmpfile to
      stage the message.  Is /tmp (or its equivalent) full, or not
      writeable?
    Without something from the Cyrus syslog, this will be hard to
      diagnose.

    On 06/01/2018 12:51 PM, Stephen Ingram
      wrote:

      Ken-

        That all appears to be working correctly. Here's a cut from
          the Postfix debug with addresses obfuscated:

          Jun  1 16:48:52 mx postfix/lmtp[18136]: send attr offset
            = 682
          Jun  1 16:48:52 mx postfix/lmtp[18136]: send attr
            dsn_orig_rcpt = rfc822;x@xxxxx
          Jun  1 16:48:52 mx postfix/lmtp[18136]: send attr
            notify_flags = 0
          Jun  1 16:48:52 mx postfix/lmtp[18136]: send attr status
            = 4.3.0
          Jun  1 16:48:52 mx postfix/lmtp[18136]: send attr
            diag_type = smtp
          Jun  1 16:48:52 mx postfix/lmtp[18136]: send attr
            diag_text = 451 4.3.0 System I/O error
          Jun  1 16:48:52 mx postfix/lmtp[18136]: send attr
            mta_type = dns
          Jun  1 16:48:52 mx postfix/lmtp[18136]: send attr
            mta_mname = imap.x.x
          Jun  1 16:48:52 mx postfix/lmtp[18136]: send attr action
            = "">
          Jun  1 16:48:52 mx postfix/lmtp[18136]: send attr reason
            = host imap.x.x[10.0.13.83] said: 451 4.3.0 System I/O error
            (in reply to end of DATA command)
          Jun  1 16:48:52 mx postfix/lmtp[18136]: private/defer
            socket: wanted attribute: status
          Jun  1 16:48:52 mx postfix/lmtp[18136]: input attribute
            name: status
          Jun  1 16:48:52 mx postfix/lmtp[18136]: input attribute
            value: 0
          Jun  1 16:48:52 mx postfix/lmtp[18136]: private/defer
            socket: wanted attribute: (list terminator)
          Jun  1 16:48:52 mx postfix/lmtp[18136]: input attribute
            name: (end)
          Jun  1 16:48:52 mx postfix/lmtp[18136]: B7B0B9A2EB0:
            to=<x@x.x>, orig_to=<x@x.x>,
            relay=imap.x.x[10.0.13.83]:24, delay=0.3,
            delays=0.19/0/0.09/0.02, dsn=4.3.0, status=deferred (host
            imap.x.x[10.0.13.83] said: 451 4.3.0 System I/O error (in
            reply to end of DATA command))

        Steve

        On Fri, Jun 1, 2018 at 9:33 AM, Ken
          Murchison <murch@xxxxxxxxxxxx>
          wrote:

          On 6/1/18 12:21 PM, Stephen Ingram wrote:

                I'm receiving a 451 4.3.0 System I/O error (in reply to
                end of DATA command) error from Postfix when trying to
                deliver to cyrus-imap and not really sure why. I'm on
                CentOS 7 (2.4.17-8) after downgrading from current
                version. I'm using Kerberos GSSAPI to connect to the
                front end, but authentication appears to be working fine
                as I can see authenticated when enabling LMTP debugging
                in Postifx. All messages are refused for delivery
                though. I'm not sure what to do. Any suggestions?

            Any chance that Kerberos is negotiating a security layer?

                -- 

                Kenneth Murchison

                Cyrus Development Team

                FastMail Pty Ltd

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-- 
Ken Murchison
Cyrus Development Team
FastMail US LLC

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