Premium Inboxes
Alternative & Review

The company was founded in June 2023 by Richard Illingworth.

Premium Inboxes describes itself as a reseller of Official Google Workspace and Microsoft 365 Business inboxes. The product appears built for teams that want a provider to handle mailbox provisioning and setup rather than assembling these pieces manually. Its public page lists a "Done-For-You" setup process, unlimited replacement inboxes, and an "Insured Infrastructure" plan.

Premium Inboxes' main difference is the focus on official infrastructure. The site highlights that they provide official Google and Microsoft business accounts, which they claim offer better deliverability than shared IPs or custom SMTP setups. They also offer Priority Support, a Dedicated Account Manager, and a Dedicated Slack Channel for Enterprise and Insured Infrastructure plans.

Trustpilot: 4.9/5, 394 reviews

"Premiuminbox at any given time because their inboxes are pretty good and I've been using it since last few months and it's working well." – Inboxkit vs premium inboxes for Google?

"I bought one inbox for $3.50 to test deliverability. I made the purchase on Friday, but I still haven’t been assigned an inbox. There’s been a lot of back-and-forth, and they’re requesting too much information and sensitive access." – Premium inboxes any good?

"Premium Inboxes aren’t pre-warmed but they are a legit company, I’ve used them before" – PremiumInboxes

🟢 Official infrastructure. Premium Inboxes offers official Google Workspace and Microsoft 365 Business mailboxes, which can be appealing for teams that prefer these established providers.
🟢 Done-For-You setup. The platform provides a fully managed setup process, reducing the technical burden on users when provisioning new mailboxes.
🟢 Unlimited replacements. Premium Inboxes includes unlimited replacement mailboxes, which helps mitigate the impact of burned accounts.

🔴 Inboxes are not pre-warmed. Users must handle the warm-up process themselves, which delays the start of active outreach campaigns.
🔴 Potential for batch suspensions. Some users have reported entire batches of accounts getting suspended simultaneously, likely due to shared provisioning patterns.
🔴 No explicit free trial. The official website does not clearly mention a free trial, making it harder for teams to test the service before committing.

Maildoso is a cold outreach infrastructure provider – we offer domains, SMTP mailboxes, and Google Workspace accounts. The company was founded in August 2023 in Granite Bay, California, by Nikita Bykadarov (Nikita Maildoso).

While other providers offer shared or dedicated IPs, we have developed IP rotation. This means your emails are sent from hundreds of different IPs (making it harder for spam filters to detect a sending pattern), and whenever any IP gets blacklisted, we automatically swap it out for a clean one.

We have also implemented self-healing mailbox technology, which both restores burned-out mailboxes and protects your active email accounts.

The result?
As of May 2026, the spam rate across our entire network of mailboxes is around 5%.

G2: 4.7/5 (181 reviews)

"Tried it mainly because of the good price, but ended up sticking with it since deliverability’s been pretty stable so far" – Thinking about trying "Maildoso". Has anyone here used it? Is it actually better than other tools?

"I tested a small batch first and results were comparable to our Google setup. Ended up moving more campaigns there because of the lower cost. That's a good strategy, buy small package and compare with your current setup" – I want to try Maildoso. What do you guys think about it?

🟢 Dynamic IP Rotation: We rotate your IP addresses in real-time – if an IP gets flagged or blacklisted, we instantly swap it for a clean one before your campaign takes a hit, ensuring your emails consistently land in the primary inbox rather than getting stuck in spam.
🟢 Self-Healing Rotation: An automated resting period for mailboxes every two weeks that clears provider flags and recovers reputation on autopilot.
🟢 Global Customer Domain Tracking: Proprietary technology that allows you to safely include links without compromising your sender reputation.
🟢 Automated Inbox Placement Tests: Free email deliverability infrastructure testing every three days for all mailboxes, giving you real-time visibility into your health.

🔴 Conservative Limits: We suggest sticking to 15 emails a day per box to keep your domains healthy for the long run.
🔴 Google/SMTP Focus: We do not support Microsoft 365/Outlook/Azure environments at this time.
🔴 Lack of built-in warmup. We do not have an integrated warm-up yet, but we are currently working on it.

Do not choose a provider just because they offer the cheapest inboxes. Cheap infrastructure always costs more in the long run. When your deliverability drops, you pay for it in three ways:

1. You burn expensive leads. Good B2B data costs money. If your emails land in the spam folder, you waste those leads. You pay for contacts who never even see your pitch.
2. You destroy your domains. Once spam filters flag a domain, it is incredibly hard to fix. You usually have to throw the domain away, buy a new one, and start the warm-up process all over again.
3. You lose revenue. Every email that goes to spam is a missed meeting. In B2B sales, missing one connection can cost you thousands of dollars in closed revenue.

You have to treat cold email infrastructure as an investment. Maildoso.ai gives you the technical tools to protect your domains and keep your emails in the primary inbox. It is the only way to scale outbound sales profitably.

Overall, we haven't found anything suspicious – the product looks reliable and is priced at a fair market rate.

We should also highlight that this provider has the highest number of reviews on Trustpilot, with over 380 ratings. That is truly impressive. Furthermore, their promised delivery time of under 6 hours is an excellent benchmark (I once set up mailboxes with Scaledmail and ended up waiting nearly three days).

Because of this, we recommend Premium Inbox.

However, we’d like to note that our mailboxes offer the same level of reliability but at a more affordable price point. We suggest diversifying your infrastructure and testing different solutions – this is the best way to find the perfect setup for your specific needs.