-d21.1

-d21.1

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Trace rewriting rules

Debug command-line switch

The -d21.1 (a.k.a. -d21 ) debugging switch causes sendmail to print each step that it takes in rewriting addresses with rules. The -d21.1 debugging switch causes output to be produced that is identical to the output produced by the -bt command-line switch (Section 8.1):

 rewrite: rule set  name or number  input:  address  rewrite: rule set  name or number  returns:  address  

First, the address (workspace) is displayed for the rule set whose name or number is shown before rewriting, and second, the address is shown after rewriting.

Because rules are recursive by nature, they can sometimes cause infinite loops (Section 18.7.2). When a rule loops more than 100 times, the following error is issued:

 Infinite loop in rule set  name or number  , rule  rule number  

If the -d21.1 debugging switch was also invoked, the preceding error is followed by:

 workspace:  state of rewritten address, so far, is shown here