[exim] What does defer (17): File exists mean ?

Can somebody please explain this error message.


2008-01-30 00:50:42 1JJzqC-0006gX-BX == xxx@??? R=domainkeys
T=domainkeys_smtp defer (17): File exists: smtpin.mx.webtv.net
[209.240.204.26]
2008-01-30 00:51:06 1JJzob-0005gt-HJ == xxx@??? R=domainkeys
T=domainkeys_smtp defer (17): File exists: smtp.vt.edu [198.82.161.8]
2008-01-30 00:51:45 1JJznc-0005Cy-6s == xxx@???> R=domainkeys
T=domainkeys_smtp defer (17): File exists: mx1.earthlink.net
[209.86.93.226]
2008-01-30 00:52:10 1JJzqP-0006lZ-Tl == xxx@??? R=domainkeys
T=domainkeys_smtp defer (17): File exists: mx1.iw.net [69.73.24.50]
2008-01-30 00:52:40 1JJzqP-0006lZ-Tl == xxx@??? R=domainkeys
T=domainkeys_smtp defer (17): File exists: mxpita.iwon.com
[208.45.133.80]
2008-01-30 00:53:26 1JJznc-0005Cy-6s == xxx@??? R=domainkeys
T=domainkeys_smtp defer (17): File exists: mx1.earthlink.net
[209.86.93.226]
2008-01-30 00:54:13 1JJzqK-0006j9-Iv == xxx@??? R=domainkeys
T=domainkeys_smtp defer (17): File exists: mail.monger.net
[72.25.112.13]
2008-01-30 00:54:40 1JJzqC-0006gY-Eg == xxx@???
R=domainkeys T=domainkeys_smtp defer (17): File exists:
2eurohosting.com [83.137.192.205]
2008-01-30 00:57:32 1JK0rt-0001tU-F2 == xxx@??? R=domainkeys
T=domainkeys_smtp defer (17): File exists: smtpinvite.mx.webtv.net
[209.240.204.25]
2008-01-30 00:58:06 1JJzqm-0006sE-UZ == xxx@??? R=few_rcpts
T=few_rcpts_smtp defer (17): File exists: gateway-f2.isp.att.net
[207.115.11.16]
2008-01-30 00:58:29 1JJzpm-0006Hf-TB == xxx@??? R=domainkeys
T=domainkeys_smtp defer (17): File exists: mx1.optonline.net
[167.206.4.77]
2008-01-30 00:58:51 1JJzpm-0006Hf-TB == xxx@???> R=domainkeys
T=domainkeys_smtp defer (17): File exists: mx2.optonline.net
[167.206.4.79]
2008-01-30 00:59:39 1JJzq0-0006LS-Nm == xxx@??? R=yahoo
T=yahoo_smtp defer (17): File exists: c.mx.mail.yahoo.com
[68.142.237.182]
2008-01-30 01:00:19 1JK0rt-0001tS-Ap == xxx@??? R=domainkeys
T=domainkeys_smtp defer (17): File exists: gateway.mchsi.com
[204.127.203.150]
2008-01-30 01:02:00 1JJzpl-0006H3-VK == xxx@??? R=domainkeys
T=domainkeys_smtp defer (17): File exists: mx1.earthlink.net
[209.86.93.226]
2008-01-30 01:02:41 1JJyXY-0001Nm-4M == xxx@??? R=domainkeys
T=domainkeys_smtp defer (17): File exists: smtp-in.myrealbox.com
[72.8.126.134]
2008-01-30 01:04:57 1JJzpl-0006H3-VK == xxx@???> R=domainkeys
T=domainkeys_smtp defer (17): File exists: spamscan.ecdh.org
[66.211.213.47]
2008-01-30 01:05:56 1JJyYF-0001QS-I9 == xxx@??? R=domainkeys
T=domainkeys_smtp defer (17): File exists: mx2.bt.mail.yahoo.com
[217.12.12.192]
2008-01-30 01:07:36 1JJyY8-0001Q0-Tn == xxx@??? R=yahoo
T=yahoo_smtp defer (17): File exists: mx1.mail.ukl.yahoo.com
[195.50.106.7]
2008-01-30 01:10:18 1JJytN-000446-5a == xxx@??? R=few_rcpts
T=few_rcpts_smtp defer (17): File exists: mx.east.cox.net [68.1.17.3]
2008-01-30 01:12:32 1JJzpY-0006Ce-8c == xxx@??? R=domainkeys
T=domainkeys_smtp defer (17): File exists: mirapoint.jcu.edu
[143.105.8.9]
2008-01-30 01:23:30 1JJzqa-0006o6-Qb == xxx@???> R=domainkeys
T=domainkeys_smtp defer (17): File exists: mail.sheridan.edu
[137.89.64.10]




This is from a machine that delivers double opt-in mailing lists, so
I'm sending many similar messages in a short time.

At first I thought it was an error from the receiving ISP, that they
were greylisting me, but I'm getting it from lots of different ISP's,
so I'm now thinking it's internal to my machine.

If so, probably when I'm doing the DomainKeys signing.

I'm running Exim 4.63 Experimental with the DomainKeys addition, on a
Debian Etch machine.

Here's my router and transport

domainkeys:
  driver = dnslookup
  same_domain_copy_routing
  domains = ! +not_domainkeys_domains
  ignore_target_hosts = 0.0.0.0 : 10.0.0.0/8 : 127.0.0.0/8 :\
                        172.16.0.0/12 : 192.168.0.0/16  
  self = defer
  transport = domainkeys_smtp

domainkeys_smtp:
  driver = smtp
  dk_private_key = /etc/exim4/domainkeys.rsa.private
  dk_selector = jan2007
  dk_strict = false
  dk_canon = nofws
  headers_add = "To: $local_part@$domain\n\
                 Sender: RESENT_FROM\n\
                 Resent-From: RESENT_FROM\n\
                 TRACE_ORIG_MSGID"
  connection_max_messages = 100
  headers_remove = "REMOVE_HEADERS:RESENT_HEADERS"
  hosts_max_try = 5
  max_rcpt = 1
  return_path = RETURN_ORIG_PATH
  size_addition = -1
  transport_filter = "/usr/local/bin/tweak_body.pl $local_part $domain 
$header_X-Click-Unsub $header_X-Email-Address-On-Bottom 
$header_X-Click-Rollcall"

Thanks for any insights.

mark