How to manage email across multiple domains

One place to manage everything. Add a domain, create mailboxes, verify that email authentication is working. All from the same dashboard, same login. No switching between providers to check whether DNS is correct on client3.com.

Shared inbox across domains. Your team handles support@client1.com and hello@client2.com from the same interface. No switching between tools, no forwarding chains, no guessing who replied.

One bill. Not per-domain fees stacked on top of per-user fees. One predictable number on your invoice regardless of how many domains you add.

Calendar and contacts included. CalDAV and CardDAV are built in. No bolting on a separate service for scheduling or contact management.

Pick a provider that treats domains as a feature, not a product. Most email hosts make you create a new account and a new subscription for each domain. That model falls apart at three domains and becomes painful at five. The question to ask: can you add a new domain without creating a new account or paying a per-domain fee? SHIPMAIL supports unlimited domains on every plan. You pay for mailbox count, not domain count. Solo is $4/mo for 3 mailboxes, Pro is $9/mo for 10, Team is $29/mo for 50.

Add your domains. For each domain, you update DNS to point email traffic to your provider. SHIPMAIL handles email authentication setup automatically. You add the records it gives you, wait for DNS to propagate (usually under an hour), and you are done. If you have managed SPF, DKIM, and DMARC records manually before, you know how easy it is to get one wrong and tank deliverability. Automatic setup removes that risk.

Create mailboxes. Set up the addresses each domain needs. Most operational domains need a hello@ or support@. Brand domains might need personal addresses for team members. On SHIPMAIL, all of these count toward your mailbox tier regardless of which domain they belong to.

Set up shared access. If your team handles inboxes across multiple domains, shared inbox support matters. On SHIPMAIL, this is built in. On Google Workspace, you need workarounds like Google Groups, delegated access, or a third-party tool.

Test deliverability. Send a test email from each domain. Use mail-tester.com to confirm that email authentication passes. Verify that replies land in the right inbox. Five minutes of testing catches DNS mistakes before they become client-facing problems.

Forwarding everything to one Gmail inbox. This is the most common shortcut and the one that causes the most problems. Forwarding breaks email authentication for the forwarded domains. Replies go out from your Gmail address, not the original domain. Clients notice when they email support@yourbrand.com and get a response from yourname@gmail.com.

Using your registrar's free email. Some domain registrars bundle basic email with a domain purchase. These services are typically unreliable, lack proper authentication, offer no calendar or contacts, and cannot be centralized with your other domains. They are a dead end.

Creating separate accounts per domain. Every separate account is another login, another password, another admin panel, another bill. Past three domains, keeping track of which provider hosts which domain becomes a part-time job. Put everything under one provider from the start.

Skipping email authentication. Without proper SPF, DKIM, and DMARC records, receiving servers are more likely to flag or reject your messages. This is especially damaging for client-facing domains where trust matters. Verify authentication on every domain before sending real email.

Adding domains without planning for shared access. Multi-domain setups almost always involve addresses that more than one person needs to monitor. Retrofitting shared inbox later means migrating mailboxes and reconfiguring access. Set it up correctly the first time.

You are an agency managing email for multiple client brands. You are a freelancer with a personal site, a consulting brand, and a side project. You are a consultant who keeps business domains separate but wants one place to manage them all.

SHIPMAIL is built for this. Unlimited domains, shared inbox across all of them, calendar and contacts included, automatic email authentication. Pro at $9/mo covers 10 mailboxes across as many domains as you need.

You need deep Google integration. If your team lives in Google Docs, Google Drive, and Google Meet, Google Workspace gives you tighter integration than any standalone email host. It costs more ($7/user/mo, per user, not per mailbox) and shared inbox requires workarounds, but the ecosystem lock-in is real and valuable if you use it.

You want maximum mailboxes for minimum cost. Migadu offers unlimited mailboxes on flat-rate plans. If you need 50+ addresses and do not care about shared inbox or calendar, Migadu is hard to beat on price.

You only have one domain. If you just need hello@yourdomain.com and nothing else, most providers handle that fine. The multi-domain advantages only matter when you actually have multiple domains.