configuring sendmail to return vacation messages
Im running a mail server on a Linux Red Hat version 8.0. Im wondering, how does one go about configuring sendmail to return vacation messages to a sender, telling him or her that the receiving party is away on a holiday or is off. The version of sendmail im using is V. 8.12.10. Is there some third party software that i must use?
As im new to Linux, I hope this messages does not sound ridiculous to any of you.
Thanks for your help.