I’m absolutely new to Mailcow and so far, it has been a superb experience. However, the Postfix logs sometimes indicate bounced email from Gmail with the following:
550-5.7.26 The MAIL FROM domain [home.social] 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 [22.214.171.124]
I don’t understand this. Here is my SPF record on smtp.home.social:
v=spf1 ip4:126.96.36.199 ip4:188.8.131.52 ip6:2a01:4f8:160:8149::2 mx a -all
What am I doing wrong? Does it have to be on the main domain (home.social)?