Markus Stumpf ([EMAIL PROTECTED]) wrote:
: On Wed, Oct 06, 1999 at 08:53:57PM +0100, Marek Narkiewicz wrote:
: > I've just set up a web based mail forwarding for users.  My question is, how do I 
:guard 
: > agianst idiots setting up a forwarding loop? eg [EMAIL PROTECTED] forwards to [EMAIL PROTECTED] 
: > which forwrds to [EMAIL PROTECTED]?

: You can't.

But you can use the same strategy that ezmlm uses, more or less.
Allow any address to be forwarded to.  If it loops, remove that
address and inform the user.  Sometimes I have wished for an
"aliasprepend" parameter that always gets executed.  This is one use
for it.

-harold

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