搭建自定义邮件服务器时遭遇Outlook发件SPF验证失败的Office 365问题求助

大家好，我正在搭建自己的邮件服务器，但遇到了个棘手的问题：用Gmail账号给我的自定义域名邮箱（比如user@yolo.com）发邮件完全正常，没任何错误，但用Outlook账号发邮件时却收到了SPF验证失败的提示，具体错误内容如下：

This error occurs when SPF (Sender Policy Framework) validation of the recipient's domain failed. If you are the recipient's mail administrator, check with your domain registrar to ensure that the SPF records associated with your domain are correctly configured. Office 365 supports only one SPF record (i.e., a TXT record that defines SPF) for your domain. Include the following domain name: spf.protection.outlook.com. If you have a hybrid configuration (i.e., if some of your mailboxes are in the cloud and others locally) or if you're a standalone Exchange Online Protection customer, add the outgoing IP address of your local servers to the TXT record.

为了解决这个问题，我已经尝试更新了我的SPF记录，但问题依然没得到解决。想请教各位大佬，有没有遇到过类似情况？或者能给我一些排查和解决的建议吗？

备注：内容来源于stack exchange，提问作者Yasha_ops