I never have a problem with the default configuration of DNS in Hestia
you show DKIM and Domain key in the screenshot, but you ask for the SPF.
Check SPF record is in other TXT register
TXT @ "v=spf1 a mx ip4:XXX.XXX.XXX.XXX -all"
where xxx.xxx.xxx.xxx is the IP of your server.
I recommend you to use emails delivery tester, like:
or
or any other you want.
You have a lot of this free service. Just open your webmail/app, write a new email to the email address given in that websites, write a regular subject, some text in the body and send. Go back to the website and press “see score” and you have result of your sendings.