Add Torob Product API v3 for store-module sites with a store setting to enable it.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/mail-dns/mail-dns.ts

@@ -2,7 +2,9 @@ export const MAIL_IPV4 = '185.214.101.41';
 export const MAIL_HOSTNAME = 'mail.meshkee.com';
 export const MAIL_MX_PRIORITY = 10;
 export const MAIL_SPF = `v=spf1 ip4:${MAIL_IPV4} -all`;
-export const MAIL_DMARC = 'v=DMARC1; p=none';
+/** Old provider selector (dkim._domainkey.example.com) — removed on mail DNS update. */
+export const LEGACY_DKIM_NAME = 'dkim._domainkey';
+export const DMARC_NAME = '_dmarc';
 
 export type MailDkimKey = {
   selector: string;