Some thoughts about spam and SPF

Shelby wrote:

> As long as they do not use "exists" to specify specific users.
>
> Using "exists" to specify users will tell a spammer which addresses to
> spam and forge (because not every recipient will be SPF protected for
> years).
The SPF record of pamho.net uses "exists":
v=spf1 exp=exp.pamho.net ip4:81.221.18.144/29 exists:%{l}.ses.pamho.org -all

Now tell me what addresses the spammer can forge.

Roger