thanks and sorry for the late response, we will some more info about dkim/spf on the domain page (https://github.com/Uberspace/manual/pull/495) as this is lesser for incoming spam than for outgoing mails. So I would close this but thanks for the approach :)
thanks and sorry for the late response, we will some more info about dkim/spf on the domain page (https://github.com/Uberspace/manual/pull/495) as this is lesser for incoming spam than for outgoing mails. So I would close this but thanks for the approach :)