Mailforge
Alternative & Review

Mailforge.ai is a cold email infrastructure provider that is part of the broader "Forge Stack" ecosystem (which also includes Salesforge and Primeforge). According to their official website (mailforge.ai), Mailforge is used by over 10,000 businesses. The platform focuses on providing shared email infrastructure that can be set up in under 5 minutes. They aim to simplify the process of creating hundreds of domains and mailboxes with automated DNS setup, catering to users who need a fast, low-cost entry into bulk sending.

G2: 4.7/5 (81 reviews)
Trustpilot: 3.5/5 (16 reviews)

Real user experiences from Reddit communities (r/coldemail, r/SaaS) highlight some critical concerns regarding Mailforge.ai. Multiple users have reported severe deliverability issues, specifically noting that the shared IP infrastructure causes emails to land in spam. Here are some representative posts:

Just launched mailforge.ai to scale cold email infrastructure in minutes: "SMTP inbox providers like Mailforge are garbage. Terrible deliverability. Your cold emails will go to spam. Gmail, Outlook etc can see that IP addresses of the email servers that Mailforge uses, and will send their emails to spam folder, since the only people using their email servers are spammers."

Zero Responses/OOOs After 500 Sends (Mailforge + Smartlead): "Zero OOOs after 500 sends is a massive red flag that your emails aren't reaching inboxes at all. 50% spam rate on Gmail tests confirms your domains are flagged. Shared IPs through Mailforge might be contaminated from other users burning them."

🟢 Fast setup: Automated DNS configures everything in 5 minutes.
🟢 Ecosystem integration: Works smoothly with Salesforge and other stack tools.

🔴 Shared IP risks: Shared IPs tie your reputation to others. If one user spams, the IP block suffers, tanking your deliverability.
🔴 Higher base cost: At $3.00 to $3.75 per mailbox, it costs more than other SMTP options.
🔴 No advanced recovery: Lacks self-healing mailboxes or IP rotation to protect your reputation.

Maildoso isn’t a complex management suite or a sequence builder – we know that real outreach needs a rock-solid foundation. We understand how the inbox works way better than those "all-in-one" platforms. From our self-healing mailbox rotation to automated email deliverability infrastructure checks, we do all the technical "dirty work" for you, so you can stop worrying about the tech and get back to closing deals.

We provide high-authority mailboxes designed to stay healthy for months, not weeks, allowing your outreach team to focus on the 1% of deals that matter rather than the 99% of tech that usually breaks. It’s a specialized environment for agencies looking for a reliable SMTP mailbox for agencies that have graduated from generalist tools.

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 fa" – 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 System: 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. You are free to send more if you choose, but be aware that aggressive "blasting" is a fast track to burning your reputation.
🔴 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.

When you evaluate cold email providers, you have to look at the underlying technology. A few years ago, you could buy basic Google Workspace accounts, warm them up, and send thousands of emails. You cannot do that anymore. Google and Microsoft use AI to track sending patterns. If your infrastructure relies on static IPs or leaves an obvious footprint, the spam filters will catch you.

This is where Maildoso.ai changes the game. We use intelligent IP rotation. The system constantly shifts the IP address you send from. Spam filters cannot easily tie your domain to a single, burned IP address.

We also use self-healing mailboxes. In a normal setup, if Google flags one of your inboxes, your campaign stops. You have to log in, figure out what went wrong, and fix it manually. Maildoso.ai automates this. The system detects the problem, pauses the bad inbox, runs a recovery protocol, and routes your emails through healthy inboxes. Your campaigns keep running, and you do not lose a day of sending.

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.

If you use the Salesforge ecosystem and want a quick shared SMTP setup, Mailforge.ai works. But shared IPs risk your deliverability.

Maildoso.ai scales safely and efficiently. It costs less per mailbox (starting at $1.80) and provides critical safeguards. With IP rotation, self-healing mailboxes, and Google Workspace accounts, Maildoso lands your emails in the primary inbox. With full API access and a 30-day money-back guarantee, Maildoso.ai delivers a robust solution for B2B outreach.