How the main options compare for multi-domain buyers
SHIPMAIL puts all domains under one account with flat-rate plans starting at $4/month. Shared inbox is built in, so the team can manage support@client1.com and hello@client2.com from the same interface. Designed for agencies and small teams running multiple brands.
Google Workspace handles secondary domains, but every person who touches a mailbox is a $7/month seat. There is no native shared inbox. If the team already lives in Docs, Drive, and Meet, Google Workspace makes sense. If email is the only Google product anyone opens, the math stops working at scale.
Zoho Mail starts at $1/user/month and supports multiple domains on higher-tier plans. Shared inbox is limited. Good if budget is the only priority and nobody needs collaborative access to shared addresses.
Migadu is the outlier. Unlimited domains on flat plans from $9/month, but no shared inbox and no team collaboration features. It is email infrastructure, not a team product. Ideal for someone managing 20 domains who just needs basic mailboxes and forwarding on each.
Fastmail charges $5/user/month and supports custom domains. No shared inbox. A solid choice for individuals who want a polished email experience on their own domain, but not built for multi-person workflows.
Who needs multi-domain email hosting
Agencies are the most obvious case. A typical agency handles email for 5 to 20 client domains. Each one has at least one operational inbox (hello@, support@, info@), and the agency team needs shared access to most of them. Per-user pricing across that many domains adds up fast.
Freelancers hit the problem at a smaller scale. A main business domain, plus one or two project-specific domains, and suddenly you are managing three separate email setups to avoid paying for a full workspace suite on each.
Multi-brand businesses have a similar issue. One team, multiple brands, each brand needs its own email identity. Managing that from one place is a basic requirement that most providers make surprisingly hard.
Then there are domain portfolio holders. If you own 15 domains and need basic email presence on each, creating a separate account per domain is not realistic.
What to evaluate
Start with how easy it is to add a new domain. Does the provider require a separate account, a separate plan, or just a DNS update? Some providers treat each domain as a new subscription. Others let you add domains the same way you add mailboxes.
Then look at pricing impact. Per-user pricing gets expensive when each domain needs dedicated mailboxes. Flat pricing absorbs new domains without a cost jump. This is the single biggest cost variable for multi-domain setups.
Shared inbox across domains matters more than most people expect. If the agency handles support@client1.com and hello@client2.com, both should be accessible in the same place. If they are not, someone ends up switching between accounts or forwarding messages manually.
DNS setup is worth checking too. Every domain needs MX records, SPF, DKIM, and usually DMARC. If you are adding domains regularly, the provider should make this consistent and fast.
Finally, admin centralization. One dashboard for all domains, mailboxes, and team access. Logging into separate accounts per domain stops being manageable past two or three domains.
How SHIPMAIL handles multiple domains
SHIPMAIL centralizes all domains in one account. The Pro plan ($9/month) covers 10 mailboxes across however many domains the team needs, with shared inbox access for up to 5 team members. The Team plan ($29/month) scales to 50 mailboxes with unlimited team members.
For an agency managing 5 client domains with 2 mailboxes each, that is $9/month total on the Pro plan. The same setup on Google Workspace costs $70/month or more depending on user count (each person accessing those mailboxes is a separate seat at $7/month). Adding a shared inbox layer like Missive or Front pushes Google Workspace to $160/month or more.
Shared inbox is where it matters most for agencies. One team member can handle support@client1.com, reply to hello@client2.com, and check billing@client3.com from a single interface. Everyone sees who is handling what. Nobody has to forward anything or switch between accounts.
When you add a domain, SHIPMAIL generates the DNS records and walks you through adding them. If you are onboarding a new client domain every month, not having to manually piece together SPF and DKIM records each time saves real time.
Common mistakes with multi-domain email
Using separate providers per domain. This creates billing chaos and makes team access nearly impossible to manage. Five domains across three providers means three logins, three admin panels, and three sets of authentication records to maintain.
Forwarding everything to Gmail. Forwarding breaks SPF alignment, creates deliverability problems, and makes replies come from the wrong address. If a client emails support@clientdomain.com and the reply comes from youragency@gmail.com, trust drops.
Ignoring shared inbox needs. Multi-domain setups almost always involve shared operational inboxes. Planning for that from the start avoids rebuilding later when the team grows or a new client domain needs collaborative access.
Over-buying seats. Per-user pricing is designed for one user per mailbox. Multi-domain setups often have more mailboxes than people, which makes flat pricing more efficient. An agency with 3 people and 10 client mailboxes pays for 10 seats on Google Workspace but only 1 plan on SHIPMAIL.