Hello, deleting all domain records added before may be necessary if you aren't sure where records are supposed to be, then following our help files and guides to add domain records.
However, for example, you misplaced MX records under Subdomain records, you can simply move them over under Domain records and Save.
If you have any problems in the future, please don't hesitate to contact our live chat support team or our ChatBot to assist you.
Hello, we apologize for the delay. The @ symbol for the MX Records mean they need to be placed at the root record, which in Dynadot control panel means to be placed under Domain Records. The priority needs to be placed under the Distance field. For future reference, MX records usually clash with CNAME records when put together under Domain Records, this is where you would use Forward instead of CNAME to get around that. Please refer to these two help files: