sendmail & vacation

Are there any tutorials available on how to set up vacation
to operate 
with a whitelist?  My users are requesting I add this
functionality to 
our mail server, but I don't want to create an open bounce.
 What I wish 
to do is take a list of domain names of our customer base
and allow 
vacation to only respond to that list.  Googling brought
back info on 
using whitelists to use in conjunction with spam blocking,
but I haven't 
been able to weed through all of the results regarding spam
to locate 
anything regarding whitelisting vacation.  From the vacation
man page, I 
see that there is an -x option that allows blacklisting, but
nothing on 
whitelisting.  Any ideas?

Also, if this functionality is not available using vacation
in 
conjunction with sendmail, would a different MTA offer this
functionality?

TIA

Greg Groth

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In the last episode (Jun 29), Greg Groth said:
> Are there any tutorials available on how to set up
vacation to
> operate with a whitelist?  My users are requesting I
add this
> functionality to our mail server, but I don't want to
create an open
> bounce.  What I wish to do is take a list of domain
names of our
> customer base and allow vacation to only respond to
that list. 
> Googling brought back info on using whitelists to use
in conjunction
> with spam blocking, but I haven't been able to weed
through all of
> the results regarding spam to locate anything regarding
whitelisting
> vacation.  From the vacation man page, I see that there
is an -x
> option that allows blacklisting, but nothing on
whitelisting.  Any
> ideas?

One way would be to use procmail to only forward incoming
messages to
vacation if they match your customer list.  Or you could add
a
whitelist feature to vacation and submit the patches 

-- 
	Dan Nelson
	dnelsonallantgroup.com
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