i sent an email and the result was

"Final verdict:

No specific action is taken by DMARC regarding the delivery of the message. This usually means the message will be delivered successfully. Keep in mind that other mechanisms such as a spam filter can still reject or quarantine a message."

make note that it took me no more than an hour at most in my first attempt to set up the email server including learning about dmarc, spf and where to put that into my email server as well as in the domain registrar.

i have had no problems for the past almost a year and i am confident there shouldn't be many problems in future.