Because you no longer have port 25; you’ve been blocked, presumably for sending junk. Based on the errors you sent me via PM, you’re now being blocked on port 25 (maybe by Google, maybe by your hosting provider). You have several problems you have to solve before you can send mail. SPF is one of them. If SPF is right, as it appears to be (unless you’ve broken it again after the last one you posted a picture of), you can move on to the next of several problems.
Maybe you want to verify DKIM is working. Maybe you want to spend time figuring out which of your users or apps is sending a shitload of spam.