я далеко не спец в sendmail, но в его сорцах в README нашел что его можно собрать с ключем -DNAMED_BIND=0
вот что пишут
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NAMED_BIND
If non-zero, include DNS (name daemon) support, including
MX support. The specs say you must use this if you run
SMTP. You don't have to be running a name server daemon
on your machine to need this -- any use of the DNS resolver,
including remote access to another machine, requires this
option. Defined by default in conf.h. Define it to zero
ONLY on machines that do not use DNS in any way.
может это?
