Email hosting for multiple domains, all in one inbox

You can read every domain in one inbox without paying per domain. There are three ways to do it: forward each domain to an inbox you already have, add the domains as aliases on one paid account, or use a mail host that doesn't charge per domain.

All three work. They differ in how much effort replying takes, and in whether each address gets a mailbox of its own.

A note on bias: we build MailMoose, which is one of the options below and far from the cheapest. We had 14 domains and 23 inboxes before we built it, so that's the setup everything here is priced at.

What does it cost with 14 domains?

Here's one person with 14 domains and 23 addresses, cheapest first. These are US prices before tax, checked on November 4, 2026.

Fewer domains open up more options. iCloud+ starts at $0.99 a month and covers 5 domains with 10 addresses each. Proton Mail Plus covers 1 domain at $3.99 a month, and Proton Unlimited covers 3 at $9.99.

Route 1: Forward everything to an inbox you already have

You point each domain at a forwarding service, and its mail lands in the Gmail you already use. Cloudflare Email Routing does this for free on domains at Cloudflare, with up to 200 rules per domain.

There are two catches:

• Replying takes extra setup. Forwarding only handles incoming mail. To answer from hello@yourproject.com, you add each address under Send mail as in Gmail, with an outgoing mail server from a sending service.
• Gmail won't collect it for you anymore. Gmail is ending POP fetching from other accounts. New users lost it in early 2026, and existing users lose it in January 2027. Google now suggests forwarding from your other provider instead.

This route suits side projects that get little mail.

Route 2: Add the domains as aliases on one paid account

You pay for one user, add your other domains to that account, and every address lands in the same inbox. It's a common setup, and if you already pay for one of these services, start here.

• Google Workspace allows up to 600 domains and 30 aliases per user at no extra cost. A domain alias gives every user a matching address on another domain, and you can have 20 of those. A secondary domain can hold its own addresses, so you add aliases on it for your one user. Either way, you set up each address in Gmail before you can send from it.
• Microsoft 365 allows up to 5,000 domains and works the same way, with aliases on one user.
• Fastmail allows up to 100 domains with free aliases and a catch-all. It can reply automatically from the address a message was sent to, which makes it the least fiddly of these.
• Zoho Mail Lite allows 30 domains and 30 aliases per mailbox. Its free plan covers just 1 domain, without IMAP or forwarding.

The catch is the word "one". It's one mailbox, so every project's mail sits in one list until you sort it with filters. A second real mailbox means a second paid user.

Route 3: Use a host that doesn't charge per domain

These give you mailboxes on as many domains as you like, for one account price.

• Purelymail costs $10 a year and says there are no hard limits on users, domains or storage. You get IMAP, POP3 and SMTP, so any mail app works. It's also upfront that it has no 24/7 support staff.
• Migadu has the same open door on domains. Micro at $19 a year allows 20 sends a day, and Mini at $9 a month allows 100 a day with 30 GB of storage.
• Folio is built for founders running several companies, and it has mobile apps. It starts at $2.99 a month for 3 domains, and unlimited domains cost $29 a month.

Already have mailboxes in different places, and don't want to move them? Mail apps like Apple Mail and Thunderbird can show all your accounts in one combined inbox for free. You just keep paying for each mailbox behind it.

Where MailMoose fits

We built MailMoose for one specific case: you want a real mailbox for each address, and an AI agent working across them.

• Every address is its own mailbox, with its own sender name and signature. Read them all together, by domain or one at a time. Replies go out from the address the mail came to.
• Domains and inboxes are unlimited on the paid plan, at $9 a month or $90 a year plus VAT, with 500 sends and 5,000 received emails a month included.
• Your agent gets all of it. Connect Claude Code, ChatGPT or Cursor once over MCP, and it can read and answer across every domain.
• App email runs on the same account. Welcome emails and receipts go out through the API.

We're the wrong pick if:

• You want IMAP, to use Apple Mail or Outlook. You use MailMoose in the browser or through your agent.
• You need aliases or a catch-all. We only create mailboxes.
• You want your old mail moved across. We don't import it.
• You want a native phone app, or a calendar and docs next to your mail.
• Price is all that matters. The table above has seven cheaper ways to do this.

Which should you pick?

• Little mail and no budget: forward to Gmail with Cloudflare.
• Already on Google, Microsoft or Zoho: add your domains as aliases.
• Classic email in your own mail app: Fastmail if you want it easy, Purelymail if you want it cheap.
• Several companies, with a phone app: Folio.
• Separate mailboxes, with an agent and app email: MailMoose. You can try it free on one domain with two inboxes.

Also sending email from your apps? We worked out what Resend costs with many domains.