Standard SMTP mailboxes are priced per mailbox, per month, and the rate depends on how many SMTP mailboxes are on your account in total — the more you have, the lower your per-mailbox rate.
SMTP mailbox pricing (Custom plan)
1–224 mailboxes: $2.50 per mailbox / month
225–924 mailboxes: $0.75 per mailbox / month
925+ mailboxes: $0.50 per mailbox / month
How this pricing applies
This is volume pricing based on your total SMTP mailbox count: whichever tier your total falls into sets the rate for all of your SMTP mailboxes, not just the ones above a threshold. For example, an account with 300 SMTP mailboxes is billed $0.75/mailbox/month across all 300 — it isn't $2.50 for the first 224 and $0.75 for the remaining 76.
If purchasing more mailboxes moves your account into a new tier, contact us if you're not sure how that affects your current billing cycle or renewal date — we can confirm the exact impact for your account.
Minimum and maximum plan size
Minimum on the Custom plan: 10 Maildoso SMTP mailboxes and 1 domain. This is the smallest configuration the Packages & Add-ons page lets you build using Maildoso-provisioned mailboxes and domains.
Maximum: There's no upper cap on how many domains or mailboxes you can purchase — the Custom plan scales as high as you need, with your per-mailbox rate determined by whichever volume tier above your total falls into.
Prefer a ready-made bundle instead?
The rates above apply to the flexible Custom plan, where you pick your own mailbox count. If you'd rather subscribe to a fixed-size bundle instead of configuring your own, Maildoso also offers Packages (Monthly and a legacy Quarterly option, the latter with domains included) — see Do you offer monthly plans? for current package sizes and prices.
What this covers
This pricing is for standard SMTP mailboxes. Google Workspace mailboxes are priced and billed separately — see our Google Workspace mailbox articles for details, or contact us if you're not sure which type is on your plan.
Domain registration is billed separately from mailboxes on the Custom plan — see Understanding your bill: mailbox plans vs. domain charges.
Questions about your specific plan or current rate? Contact us with your account email and we'll confirm your pricing.