fix: add multi email transport system (#2942)

packages/ee/server-only/lib/send-organisation-account-link-confirmation-email.ts

@@ -75,6 +75,13 @@ export const sendOrganisationAccountLinkConfirmationEmail = async ({
     },
   });
 
+  // We only take `emailLanguage` here and intentionally ignore the resolved
+  // `emailTransport`/`senderEmail`. Unlike other INTERNAL emails, this is an
+  // auth-critical SSO account creation/linking confirmation: it must always be
+  // delivered from trusted Documenso infrastructure (see the `mailer.sendMail`
+  // below). Routing it through the organisation's own (potentially
+  // misconfigured) transport could block account linking and lock users out of
+  // their own SSO setup.
   const { emailLanguage } = await getEmailContext({
     emailType: 'INTERNAL',
     source: {
@@ -101,6 +108,10 @@ export const sendOrganisationAccountLinkConfirmationEmail = async ({
 
   const i18n = await getI18nInstance(emailLanguage);
 
+  // Deliberately uses the global Documenso mailer + internal sender (not the
+  // organisation's configured email transport) so auth/SSO confirmation mail is
+  // always sent from trusted, controlled infrastructure. See the note on the
+  // getEmailContext call above.
   return mailer.sendMail({
     to: {
       address: user.email,