sendmail & vacation

Dan Nelson dnelson at
Thu Jun 29 15:20:12 UTC 2006

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
	dnelson at

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