Zapmail:
The Ultimate Review (2026)

Zapmail is a reseller of Google Workspace and Microsoft 365 mailboxes designed for cold outreach teams that want volume without the manual setup work. It takes care of the slow part of provisioning – buying domains, configuring SPF, DKIM, DMARC and MX records, and spinning up accounts – so a whole fleet of mailboxes goes live in roughly five minutes. Each domain gets its own isolated workspace, which limits cross-contamination if a single mailbox gets flagged.

Pricing starts at $39 per month, or about $3 to $3.5 per mailbox. API access lives on the $299 Pro tier, and refunds are not offered, so the entry plan effectively doubles as your test drive.

Trustpilot: 4.5/5 (72 reviews)
G2: 4.3/5 (6 reviews)

"Zapmail provides India-based Google Workspace accounts. Both their website and support team have falsely stated that they offer US-based IPs." – Zapmail.ai Review - Breaking down myths

"I've been using Zapmail for Outlook the past 3 months, pretty happy so far. Wouldn't use the Google solution as I prefer an official reseller, either Mailerr or PuzzleInbox." – Has anyone used Zapmail for buying the mailboxes? How are their mailboxes Good or Bad?

🟢 Setup takes around 5 minutes with automated DNS configuration.
🟢 Provides admin access to Google Workspace.
🟢 Built-in tools for generating domains and mailbox profiles.

🔴 API access only on the $299/month plan.
🔴 User reports of India-based IPs despite claims of US-based IPs.

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.

It’s tempting to choose a provider based solely on the lowest price, but budget infrastructure often leads to hidden costs. When deliverability drops, the consequences usually show up in three areas:

• Burned Leads: High-quality B2B data is expensive. If emails land in spam, those contacts never see the pitch, and the budget spent on data is lost.
• Damaged Domains: Fixing a domain flagged by spam filters can be a massive headache. Often, it’s easier to just buy a new one and start the warm-up process all over again.
• Missed Revenue: Every missed inbox is a missed meeting. In B2B sales, losing even one connection can mean missing out on thousands in closed revenue.

Cold email infrastructure is better viewed as an investment. Maildoso provides the technical tools to protect domain reputation and help keep emails in the primary inbox.

Zapmail is a well-known and reliable provider that has earned a solid reputation in the market.
We have carefully analyzed their product and can confidently recommend it for use.

At the same time, we think it's important to highlight a few key points:

• When it comes to Google Workspace mailboxes, Zapmail, just like Maildoso, offers fully official accounts with business licenses.
• We offer a private SMTP infrastructure – it is much more flexible and allows us to rotate mailboxes and IPs to ensure maximum deliverability.
• Pre-warmed mailboxes are important if you don't have time for a warmup period; otherwise, warming them up yourself is a more reliable option (it is more cost-effective and gives you full control over the process).