How long must SpamAssassin or an MTA wait for DCC results?
DCC clients including dccproc, dccifd, and dccm can wait as long as about 16 seconds for an answer from a DCC server. Except when an anonymous client triggers the progressive delays that are among the defenses against denial of service attacks in the public DCC servers, delays are almost always less than 10 seconds. Delays for DNS blacklists (see dccifd -B) are additional.
