"[..] cause sendmail to use the resolver options defined by the ResolverOptions option, except that it always enables DNSRCH when doing lookups with the $[ and $] operators."
...except I'm dealing with an ancient system where /something/ in the resolver is broken when sendmail walks down the search path for a domain that's unresolvable in the recipient list of a mail. (Not sure why it even checks those when it's the fnal destination for the message.)
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