Thank you very much for the fast reply. I was looking on sieve or postfix and I do not find how I can do it. Since I believe that will be the best way to do it. Can you help me out?
Thank you On Thu, Sep 17, 2015 at 1:51 PM, Sebastian Nielsen <sebast...@sebbe.eu> wrote: > No. > SPF is designed to be secure, eg you cannot add some header to bypass the > authentication, then every phisher would add such a header. > > What you need to do, is to rewrite the FROM adress or encapsulate the > email. > Rewriting FROM adress can be as simple as rewriting yourn...@yahoo.com to > yourn...@yourserver.tld , or even yourname.yahoo....@yourserver.tld > Then you host a own SPF record. > The disadvantage of this method, is that it will not be possible to reply > or answer on emails from your google account. You could however, since you > know the domain and username, manually write the correct @yahoo.com > adress in the “to” field when replying to a email. > > Another way, is to encapsulate the email in a new message/rfc822 > container, where the outer container contains like From: > forwar...@yourserver.tld To: somen...@gmail.com , Subject: Fwd: Original > Subject > And then the inner container contains: > From: yourn...@yahoo.com > To: yourn...@yourserver.tld > Subject: Original Subject > > The advantage with this method is that you can reply to the email by > replying to the inner container. This is how most email clients forward > email, by encapsulating them. > In most cases, a email client will either show a iframe showing the > original content, a button to open the mail in a new window, or a attached > file that can be opened to show the mail. > > Of course, its important that you do publish a own SPF record. > And also, its a bad idea to forward spoofed email, since this could get > your domain “blacklisted” at google, thus its a good idea to SPF and/or > DKIM check any incoming email on your forwarder adress before forwarding > them. > > *From:* Il Neofita <asteriskm...@gmail.com> > *Sent:* Thursday, September 17, 2015 7:40 PM > *To:* postfix-users@postfix.org > *Subject:* Forward rejected by yahoo > > Hi, > I have the following problem if I forward an email received from yahoo to > an other yahoo account the message is rejected. > If I send a message from yahoo -> my server and forwarded to a google > account the message is marked as spam, since is considered a spoofed. > > Can I fixed this adding some header? > > Thank you >
