📹 Prefer to watch? See the 5-minute Maildoso Demo for a walkthrough of buying domains and creating mailboxes, or browse the full Video guides: product demo & cold email tutorials.
From your dashboard Home page, use the Quick actions panel (Add domains, Create email accounts, Connect to sequencer, Set up MasterInbox) for step-by-step guidance through each part of setup.
The setup process is designed to be straightforward and intuitive. Once you've purchased, see How long until my domains and mailboxes are ready to use? for typical activation timing.
Google Workspace: new allotment isn't currently available to purchase — current status: Google Workspace mailboxes.
Please also keep the following in mind:
There is no fixed platform-wide cap on domains or mailboxes — Custom plan and Package sizes scale up to 1,000+ mailboxes and 100+ domains. Your actual limits are set by your current subscription's mailbox and domain slots (see Billing → Packages & Add-ons). To add more mailboxes to an existing plan, see Adding more mailboxes to your plan. Domains purchased through Maildoso are managed by Dynadot, and ownership can be transferred to your personal Dynadot account, allowing you to control the domain and its DNS settings.
If you see '0 available' for mailboxes or domains, this means your current plan's slots are fully allocated — your existing mailboxes and domains are unaffected.
How many mailboxes per domain
Google Workspace mailboxes: maximum 5 per domain.
SMTP mailboxes: 4 to 8 per domain is our recommendation. For larger accounts, up to 10 per domain can be agreed with support on a case-by-case basis — talk to us before going above 8. SMTP mailboxes provide IMAP/SMTP access and dashboard controls, but this does not equate to full Google Admin Console control for Google Workspace organizations.
Spreading mailboxes across more domains is about limiting your exposure: a domain-level problem (a blacklist listing, a registry suspension, a DNS issue) takes every mailbox on that domain down at once, so fewer mailboxes per domain means less damage from any single incident. Density also multiplies domain-level volume, because sending limits are applied per mailbox: at the recommended 15 campaign emails/day, 8 mailboxes on a domain send up to 120/day, which is where we want it. See What's the daily email limit per email account?
Tested maximum, not a recommendation: the platform doesn't hard-block you at 8, and we have tested densities of 30–50 SMTP mailboxes on a single domain — at that level the mailboxes work and send normally. That is the tested ceiling, not advice: at 30–50 per domain one domain is sending up to 450–750 campaign emails a day, and one blacklist listing takes all of them down at once. For cold email, stay in the 4–8 range unless you've agreed a higher density with us. Full reasoning: What are the best practices for configuring domains?
For example, if your plan includes Google Workspace allotment and you have 7 domains, you can allocate 5 Google Workspace mailboxes per domain (totaling 35 accounts) and distribute the remaining slots across SMTP accounts.
Two things to know before you start:
If you're connecting your own (external) domain, set only our 2 nameservers at your registrar — nothing else. See Can I bring my own domains. When you point your domain to Maildoso’s nameservers, the platform automatically configures essential records such as MX, SPF, DKIM, and DMARC to optimize email deliverability.
A domain must be fully active before you can create mailboxes on it.- Some registrars, such as Cloudflare Registrar, may not allow changes to nameservers. In such cases, you must transfer the domain to a compatible registrar before connecting it to Maildoso.
Plan your mailbox distribution with future growth in mind to ensure scalability.