On Fri, Jun 04, 2004 at 04:47:26PM -0600, Weldon Whipple wrote:
|
| 3. Add a "per user" SPF record. (Does such a thing really exist?) [Note:
| Any per-user SPF record I can imagine would post on the Internet (via DNS)
| a whitelist of from addresses that could send e-mail--what more could a
| spammer ask for?!!].
The way we're going to do it here is:
pobox.com TXT "v=spf1 a mx etc ... redirect=%{l}._spf.pobox.com"
then:
mengwong._spf.pobox.com TXT "v=spf1 a:dumbo.pobox.com -all"
user1._spf.pobox.com TXT "v=spf1 include:earthlink.net ?all"
user2._spf.pobox.com TXT "v=spf1 include:verizon.net ?all"
etc.
| 4. Tell the club that members can use the club e-mail address only in a
| Reply-To header.
|
| 5. Quit offering the forwarding e-mail addresses to club members.
|
6. Outsource the thing to a forwarding service that does
these things for a living :)
7. When MUAs let you configure return-path differently from
"From:" header address, use the club address in the
"From:" and the ISP-given email address in the
return-path.