Folio: Multi-Domain Email

Multi-domain email - one inbox for every business and custom domain you run. Folio is the email app for one person running many businesses: bind every custom domain you own and read all of them in a single inbox.

Folio is for three brands, five domains, and one head to keep them straight. Every domain lands in one reading view, color-striped down the margin so you always know which business a letter belongs to.

One inbox, many domains

Bind every custom domain you own. Mail from all of them arrives in one unified inbox; a stable color stripe per domain keeps the contexts separate without juggling browser profiles or multiple email apps.

Reply as the right business, automatically

Folio auto-selects the correct From address for every reply, so a letter to your consulting client never goes out under your product domain. Each domain signs with its own DKIM key (RSA-2048), so sending reputation and deliverability stay partitioned per business.

Anti-spoofing built in

Folio checks SPF, DKIM, and DMARC on every incoming message and files mail that fails authentication straight to spam - with the reason explained in plain English. The "email from my own address" forgeries that slip past other inboxes don't reach yours.

See who's sending as your domains

The Deliverability view reads the DMARC reports mailbox providers file about each of your domains, so you can see every server sending as you and tighten your policy with confidence.

Flat pricing, not per-seat

You are one person, not a team. Folio charges a flat price per operator - Solo, Studio, or Holding Co. - never per user, per domain, or per mailbox.

Passwordless by design

Sign in with a magic link. No password to leak, reset, or reuse.

Calendar included

The calendar lives inside the same account and app - no second subscription, no second login.

Built for portfolio entrepreneurs, solo founders, multi-LLC owners, consultants with a product, multi-store Shopify operators, and the holding-company-of-one. Multi-domain email, many addresses, one inbox.