-d8.7
Yes/no response to -d8.5 Debug command-line switch
The -d8.7 debugging
switch causes sendmail to print
a yes or no response to each of the “trying” lines
printed by −8.5.
“Yes” means that the host could
successfully be fully canonicalized. A yes answer
prints just this:
YES
If the host could not be canonicalized, a more complex answer is printed:
NO: errno=errornum, h_errno=herrornum
The errornum is the system error number (if any) from <errno.h>, and herrornum is the resolver-specific error from <netdb.h>, as shown in Table 15-6.
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