Simple Python script as SMTP server for outgoing e-mails?

[Sanjay Arora]

On Tue, Jul 23, 2013 at 2:49 PM, Chris Angelico <rosuav at gmail.com> wrote:


> Ah, there's a solution to this one. You simply use your own
> envelope-from address; SPF shouldn't be being checked for the From:
> header. Forwarding and using the original sender's address in the SMTP
> 'MAIL FROM' command is forging mail from them, so it is correct for
> that to be thrown out. The mail is coming from your own account, so
> you put your address in it, and you might even be able to put an
> uber-strict SPF record like "v=spf1 ip4:1.2.3.4 -all" which is quick
> to process and guarantees that nobody can pretend to forward mail on
> your behalf. The checks are for the *current connection*, not anything
> earlier.
>
> ChrisA
>

Bit Late, but do check out  http://www.openspf.org/FAQ/Forwarding

Forwarding does get broken, but a partial solution in whitelisting is
there, though too manual & therefore cumbersome.

Another option http://www.openspf.org/SRS is there to be worked in
conjunction with spf. There is a best spf practices guide on the site. And
all this email authentication issue given on openspf.org makes an
interesting read.

Ciao.
Sanjay.
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