The default is 3 minutes. The default is 5 minutes. The default is 5 minutes. The default is 2 minutes. The default is 20 minutes.
V prints a version message and exits.
W turns on the DNS WKS checking, and if the remote system does not have SMTP in its WKS-bits, email delivery to such address is aborted with an error message. Optionally on the same line the scheduler may tell which host is to be looked for from the recipients of the message. This program produces diagnostic output on the standard output. The text is terminated by a linefeed.