tuning the timeout for reverse lookups

[what ? ...say what ...yo yo yo]

Does anyone know of a tuning parameter to limit the amount of time a
bind 8.2.2 p5  server waits before timing out when attempting a reverse
lookup? It seems by default to wait 60 seconds.

This is a problem because sendmail server will attempt to do a reverse
lookup on the mail server originating the mail message before it will
accept the incoming message. If bind waits sixty seconds before giving
up sendmail will timeout before bind and the mail will not be relayed.

has anyone seen this problem or know of a fix?

thanks..