That link is outdated, but you along with the link set me about the right path.
Google for linux vacation got me to the Sourceforge page
I downloaded and - unzip , untar and install with
Had a couple of errors about the man pages, not important.
Its in it seems to work:
su to user i want to set up vacation for;
and run vacation at command line
That takes u to a vi session where u can set your message.
Edit, save done with VI.
That also creates two files:
.forward (contains the command to do the deed)
.vacation.msg (what you just made)
vi them for further info.
That sets the default .vacation.db file that says your away and sets it to run for 7 days.
Quote edit from below
1. Reply interval = 0. Send a vacation notice only to each sender's first email. Subsequent email by the same sender do not get a vacation notice:
2. Reply interval = 10. Send a vacation notice to each sender, so long as the sender has not received a previous vacation notice in the last 10 days.
Hope this helps.
DISCLAIMER - IM A NEWB if something is wrong here warn me ill fix it.