Set MX record in Namecheap DNS manager

Namecheap have great tutorial how to edit DNS record using their DNS manager. Please visit Namecheap help page and scroll the page until you find the TXT Records section.

Add these three TXT records as follows:

HostTXT value
@v=spf1 ~all
default._domainkeyv=DKIM1; k=rsa; p=<your public key>
_dmarcv=DMARC1; p=none;
You will get your public key for DKIM from Mailspot.