[StAPF] Mail delivery failed: returning message to sender

This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: venzke67(a)gmail.com (ultimately generated from info(a)jusos-sh.de) host gmail-smtp-in.l.google.com [142.251.5.27] SMTP error from remote mail server after end of data: 550-5.7.26 The MAIL FROM domain [zapf.in] has an SPF record with a hard fail 550-5.7.26 policy (-all) but it fails to pass SPF checks with the ip: 550-5.7.26 [80.67.18.53]. To best protect our users from spam and phishing, the 550-5.7.26 message has been blocked. Please visit 550-5.7.26 https://support.google.com/mail/answer/81126#authentication for more 550 5.7.26 information. y16-20020adffa50000000b0030ae5675576si3712972wrr.113 - gsmtp