TechNestAfter the domain opens, the detail is in the DNS lines. Each line has a type and a value. Pasting a value without knowing the type can drop mail that was working.
Three lines are enough
An A record ties the name to an address number. That is where the site opens. An MX record says which server receives the mail. A CNAME sends one name to another name. If a line is none of these, do not delete it before you read what the tool that added it asked for.
Keep them in one place
If the nameserver is at another firm, the DNS lines live there too. If the nameserver is at TechNest, the lines are on the domain card. Holding an A record in both places leaves it unclear which one applies. The domain card is where these lines belong.