The token is unique to each poster, and will differ from server to server. There is no way to know what the token for [log in to unmask] is going to be on this or that LISTSERV installation. It would have been much easier to implement something like ‘joe%yahoo.com’ but that would have opened the door to abuse. As implemented, you can only contact a Yahoo user via the [log in to unmask] address if the Yahoo user in question has submitted a posting and that posting has been accepted for distribution.



Typically one would have an incoming rule directing *-request to LISTSERV (and it is automatic on Windows).



  Eric



From: LISTSERV List Owners' Forum [mailto:[log in to unmask]] On Behalf Of Wayne T Smith

Sent: Wednesday, April 23, 2014 13:18

To: [log in to unmask]

Subject: Re: Problem now with From: *@aol.com



On Tue, Apr 22, 2014 at 9:12 PM, Ben Parker <[log in to unmask]<mailto:[log in to unmask]>> wrote

​, in part​

:

-If From: address re-write is necessary, you can see the format: [token][log in to unmask]<mailto:[log in to unmask]>.  The numerical [token] is unique to each LISTSERV instance.



​I'm wondering a couple of things, which no doubt will become obvious soon ...



  *   Is the token fixed for a server or fixed for a server-poster combination?

  *   If the latter, how does the Listserv postmaster/installer have his/her mail facility direct incoming mail to such a generic address ​(to Listserv)?

Cheers, Wayne



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