how SPF resp. SRS broke my mail filtering and cost me a lot of sleep recently

https://en.wikipedia.org/wiki/Sender_Policy_Framework = SPF https://en.wikipedia.org/wiki/Sender_Rewriting_Scheme = SRS https://www.getmailbird.com/what-spf-resources-are-available-now-that-openspf-org-is-gone/ http://www.openspf.org/SRS (unfunctional starting 2019-02) http://www.heise.de/newsticker/meldung/United-Internet-verschaerft-Spam-Bekaempfung-3225281.html (in German) – the action that triggered my trouble I am using e-mail addresses on my “personal domains” (like Hayek.name), which implies some sort of forwarding to an IMAP server. The company, that hosts my “personal domains”, (UDAG) also forwards massive amount of e-mail messages to… Continue reading how SPF resp. SRS broke my mail filtering and cost me a lot of sleep recently