exim -qff output for 1 out of 27 mails;
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2007-03-07 00:00:27 1HOIm5-0004Hu-NV Unfrozen by forced delivery
2007-03-07 00:00:27 1HOIm5-0004Hu-NV ** root@linux.ids.com: Too many "Received" headers - suspected mail loop
2007-03-07 00:00:27 1HOIm5-0004Hu-NV Frozen (message created with -f <>)