Gmail/fastmail rely more on DKIM than SPF. And, some huge providers (such as Microsoft, Mail.ru) have no SRS enabled for their forwarding mails. In my experience, don't rely too much on SPF settings, either for incoming email or for outgoing mail.
regards. On Sat, Apr 13, 2024 at 6:52 PM Paul van der Vlis via Postfix-users < postfix-users@postfix.org> wrote: > Hallo, > > Unfortunately, I have quite a few customers who want to receive email > from their own domain at a different email address, such as a Gmail or > Hotmail address. I forward this in /etc/postfix/virtual. > > But I actually don't understand why this arrives, especially if the > sender has an SPF or DMARC clearly states that it should be rejected if > the email comes from the wrong IP. > > Perhaps Gmail and others don't care about that, but it could also be > that they look beyond the forward address and see that it comes from a > legitimate IP, but only forwarded is. > That would be good, but maybe easily forged without DKIM? > > Could someone tell us more about this? > > And what is a good solution for forwarding? Rewrite the sender? SRS? > > With regards, > Paul van der Vlis > > > -- > Paul van der Vlis Linux systeembeheer Groningen > https://vandervlis.nl/ > _______________________________________________ > Postfix-users mailing list -- postfix-users@postfix.org > To unsubscribe send an email to postfix-users-le...@postfix.org >
_______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
