Function DNSRecord

internal/dkim/dkim.go:134–138

DNSRecord renders the TXT record the user must publish. Returns the hostname (left of the apex) and the record value. Example for selector "e2a202605" + domain "mail.acme.com": name = "e2a202605._domainkey.mail.acme.com" value = "v=DKIM1; k=rsa; p=MIIBIjANBgkq..."

(selector, domain, publicKeyDNS string)

//	name  = "e2a202605._domainkey.mail.acme.com"
//	value = "v=DKIM1; k=rsa; p=MIIBIjANBgkq..."
func DNSRecord(selector, domain, publicKeyDNS string) (string, string) {
	name := fmt.Sprintf("%s._domainkey.%s", selector, domain)
	value := fmt.Sprintf("v=DKIM1; k=rsa; p=%s", publicKeyDNS)
	return name, value
}

// ExtractPublicKeyFromTXT pulls the "p=" payload out of a TXT record's
// raw value, trimming any whitespace mail systems sometimes inject when