forwarding email with sieve of spf domains

[Stephan Bosch]

On 25/10/2020 16:48, Marc Roos wrote:
> Say someone has setup spf for his domain and sends an email to a user
> that has in roundcube enabled the sieve forward. If the message is
> forwarded without altering the message headers, this could result in a
> message being blocked or not relayed, because sending hosts ip, is not
> in the spf of the from: domain.
>
> Possible solutions are:
>
>   -  add option if enabled, it replaces the From: with that of the email
> address of the sieve user. (Maybe move the original sender to the
> Reply-To header? Maybe exception for 'internal' forward?)
>   -  Upon processing the message, check the spf records, if they are
> enforced, do the above, otherwise do nothing.
>
>
> https://tools.ietf.org/html/rfc5228#section-4.2

This setting is related:

https://doc.dovecot.org/settings/pigeonhole/#plugin-sieve-setting-sieve-redirect-envelope-from

Regards,

Stephan.