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...@x.com 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 = delayed 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 <mu...@fastmail.com> 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 > > > ---- > Cyrus Home Page: http://www.cyrusimap.org/ > List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ > To Unsubscribe: > https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus >
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