As proposed on the dkim-milter-beta list:
For those running dkim-filter under Postfix, under Sendmail with MilterLogLevel below 9, or on a separate box, it would be useful to see successful verification/signing operations logged by dkim-filter, too. See the attached patch for what I have in mind - it will produce log entries like:
Jul 25 16:19:53 foobar dkim-filter: 554325394: DKIM signature successfully verified
Jul 25 18:10:31 foobar dkim-filter: 6922B538E: DKIM-Signature header successfully added
(Note that I deliberately kept the messages terse - with the header add message e.g., I didn't include the header value [though that would be available at that point in the code].)
In order to reduce overlap with Milter logging (when level > 8), one solution could be to make this kind of logging configurable.
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