forwarding email with sieve of spf domains

[Robert Schetterer]

Am 25.10.20 um 16:48 schrieb Marc Roos:
> 
> 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
> 

long time ago i did tests about this

https://blog.sys4.de/email-forward-mit-sieve-ohne-spf-dmarc-und-dkim-konflikte-de.html

perhaps it helps , but its not up2date

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