5 Best Mailerr Alternatives For Better Deliverability

If Mailerr is not giving you the deliverability or control you need, it makes sense to look at other infrastructure tools.

The problem is likely the infrastructure, not the message.

I reviewed several cold email infrastructure tools and picked the top five.

In this guide, I will compare the 5 best Mailerr alternatives and break down what each tool is, along with its key features, pricing, and pros and cons.

This will help you quickly see which option makes more sense if you want better deliverability.

TL;DR- Mailer Alternatives

• Mailforge is a strong Mailerr alternative if you want infrastructure built specifically for cold email, with automated setup and easy scaling.
  
  
• Infraforge is better suited for teams that want dedicated IPs and more hands-on control over deliverability.
  
  
• Inframail is a good fit for Microsoft-based teams and agencies that want unlimited inboxes under a flat monthly plan.
  
  
• Mailscale helps when speed matters and you need to create a large number of inboxes quickly.
  
  
• Maildoso is useful if you want flexibility by mixing SMTP and Google Workspace inboxes.

Get Mailforge. Set up a clean, scalable cold email infrastructure in minutes, at just $2–$3 per mailbox

How I Chose These Mailerr Alternatives

Before listing the alternatives, here are the exact factors I used to shortlist these tools:

• Ease of initial setup and speed of inbox creation
  
  
• Support for creating and managing mailboxes and domains
  
  
• Automated handling of DNS and authentication records (SPF, DKIM, DMARC, MX)
  
  
• Setup built to support deliverability and inbox placement
  
  
• Ability to scale across multiple inboxes and domains
  
  
• Clear and transparent pricing for infrastructure usage
  

Quick Comparison of 5 Best Mailerr alternatives

1. Mailforge 

Mailforge is a Shared IP cold email infrastructure platform built to help teams set up and scale outbound email with deliverability in mind.

Mailforge lets you create large numbers of domains and mailboxes in minutes. 

It automatically handles DNS setup, including SPF, DKIM, DMARC, and tracking records, so inboxes are ready for cold outreach without manual configuration.

The platform runs on a shared IP infrastructure that is designed specifically for cold email. 

This setup is meant to give senders a more stable starting point compared to setting everything up on their own. 

Mailforge focuses on quick setup, simple management, and infrastructure that supports outbound use at scale.

Key Features

• Uses shared IP infrastructure built for cold email
  
  
• Automatically sets up SPF, DKIM, DMARC, and tracking records
  
  
• Supports bulk DNS updates and domain transfers
  
  
• Offers SSL and domain masking for secure scaling
  
  
• Works with Salesforge and other outreach tools
  
  
• Includes monitoring related to the domain and sender reputation
  

Pricing

Mailforge pricing is based on domains and mailbox slots.

• .com domains are priced at $14 per year, charged once
  
  
• A minimum of 10 mailbox slots is required
  
  
• Mailbox pricing:
  
  
  • $3 per mailbox per month when billed monthly
    
    
  • Around $2 per mailbox per month when billed yearly
    

The subscription includes automated DNS setup, inbox hosting, ongoing maintenance, and customer support.

Optional add-ons:

• SSL and domain masking, priced per domain, billed monthly or yearly
  

Mailforge Pros

• You can create hundreds of domains and mailboxes very quickly, which makes it easier to run large cold email campaigns.
  
  
• You are not forced to use Google Workspace or Microsoft accounts, so inbox creation stays flexible.
  
  
• If a mailbox or domain causes issues, you can replace it without rebuilding your entire setup.
  
  
• Domains are portable. If you change sending tools later, you can keep using the same domains and mailboxes.
  ‍
  “New domains and mailboxes are easy to set up, and nothing feels locked in. Switching tools doesn’t mean starting over.” - Colin Graham, Trustpilot
  
  
• You can reuse domains across campaigns instead of setting everything up again from scratch.
  

Mailforge Cons

• Mailforge does not send emails or run sequences, so you need another tool for campaigns.
  
  
• Because it uses shared IPs, you do not get full control over sender reputation like you would with dedicated IPs.
  
  
• You need to start with at least 10 mailbox slots, which can be more than what very small teams need.
  

Personalized Outbound Strategy

Get The Right Outbound Strategy In Minutes

Enter your email to get a custom plan & stack recommendation for your business

Generate my personalized plan

It's being carefully crafted by AI

Please check your mailbox in 5 minutes

2. Infraforge 

Infraforge is a private cold email infrastructure tool built for teams that want more control over deliverability using dedicated IPs.

Infraforge lets you create domains and mailboxes with automated DNS setup, or use pre-warmed infrastructure if you want to start sending sooner. 

Infraforge also includes features like IP rotation, smart sending limits, and real-time monitoring. 

These are designed to help keep outreach activity steady and reduce deliverability risks as volume increases.

Key Features

• Uses private email infrastructure with dedicated IPs for each mailbox.
  
  
• Automatically sets up SPF, DKIM, DMARC, and tracking records for every domain.
  
  
• Supports pre-warmed domains and mailboxes to start sending sooner.
  
  
• Allows bulk DNS updates and easy domain transfers.
  
  
• Lets you manage multiple teams or clients using separate workspaces.
  
  
• Works with Salesforge and other sending tools without changing your workflow.
  
  
• Adds SSL and domain masking for better security and domain protection.
  
  
• Supports multiple IPs so sending can be spread across the infrastructure.
  
  
• Includes Masterbox to view emails from all inboxes in one place.
  
  
• Provides real-time monitoring and alerts for deliverability issues.
  
  
• Offers an API for automating infrastructure management.

Pricing

Infraforge pricing is based on domains, mailbox slots, and IPs.

• .com domains cost $14 per year, charged once
  
  
• Minimum 10 mailbox slots required
  
  
• Mailbox pricing:
  
  
  • $4 per mailbox per month, billed quarterly
    
    
  • Around $3 per mailbox per month, billed yearly
    

Included with the subscription:

• Automated DNS setup
  
  
• Inbox hosting and maintenance
  
  
• Expert customer support
  
  
• Access to the Infraforge API
  

Optional add-ons:

• SSL and domain masking, priced per domain
  
  
• Dedicated IP addresses, priced per IP per month
  
  
• Masterbox, priced per workspace
  

Infraforge Pros

• When deliverability drops, you can quickly see which domain or IP caused the issue instead of guessing.
  
  
• The infrastructure stays stable over time, which is helpful if you run the same offers for months.
  
  
• You can keep domains active for longer periods instead of rotating them every few weeks.
  
  
• Dedicated IPs give you more control over sender reputation compared to shared setups.

• Pre-warmed domains and mailboxes help you start sending faster without waiting too long.

Infraforge Cons

• Dedicated IPs are optional add-ons, so scaling with private IPs can increase costs over time.
  
  
• Some important features like Masterbox, SSL, and additional IPs are not included by default and cost extra.
  
  
• Infraforge does not handle sending, so you need separate tools to run campaigns.
  
  
• You need to start with at least 10 mailbox slots, which can be more than what small teams need at the beginning.

3. Inframail

Inframail is a cold email infrastructure platform built for fast setup and large-scale outreach

It focuses on creating Microsoft-based email inboxes using dedicated hosting. 

This makes it easier for agencies and B2B teams to create and manage a large number of inboxes without depending on Google Workspace or Outlook plans.

Inframail handles the technical setup automatically, including SPF, DKIM, and DMARC records. 

Along with built-in IP and domain health monitoring, it helps teams keep their domains in good shape while scaling cold email campaigns.

Key Features

• Uses dedicated hosting instead of shared hosting
  
  
• Automatically sets up SPF, DKIM, DMARC, and tracking records
  
  
• Supports quick domain purchase and domain transfers
  
  
• Works with tools like Instantly, Smartlead, and Reachinbox
  
  
• Supports custom tracking domains
  
  
• Allows adding profile pictures to inboxes
  
  
• Provides real-time IP and domain health monitoring
  
  
• Built on Microsoft’s cloud infrastructure
  

Pricing

Inframail offers multiple plans depending on usage and scale.

Unlimited Plan – $129/month

• This plan is good if you want unlimited inboxes without paying per inbox.
  
  
• You get one dedicated US IP, automated setup, and can create inboxes as needed while buying domains separately.

Agency Pack – $327/month

• This plan is built for agencies managing higher volume and multiple clients.
  
  
• It includes unlimited inboxes, three dedicated US IPs, more free domains, and priority deliverability support.

Inframail Pros

• You can create a large number of inboxes quickly, which helps when scaling cold email without long setup times.
  
  
• The infrastructure runs on Microsoft’s cloud network, using well-established IPs that are safer for cold email sending.
  
  
• Tracking links are protected with a redirect layer that helps prevent spam filters from flagging your domains.
  
  
• Real-time IP and domain monitoring helps you catch deliverability issues early.
  
  
• Domains remain under your control, so you can reuse them even if you switch tools later.
  

Inframail Cons

• Warm-up is not included, so you still need a separate warm-up tool before sending at scale.
  
  
• Inframail does not send emails or manage campaigns, which means you need a separate sending platform.
  
  
• Domains are not included by default and usually need to be purchased separately.
  
  
• The platform is mainly built around Microsoft-based inboxes, which may not fit teams that prefer Google-based setups.
  
  
• Even though inboxes are unlimited, you still need to follow safe sending limits to protect deliverability.
  

4. Mailscale 

Mailscale is a cold email inbox creation platform designed to help teams scale outreach by generating inboxes in bulk, very quickly.

It is mainly built for agencies and B2B teams that want to create dozens or even hundreds of inboxes without going through long manual setups. 

With Mailscale, you can buy or connect domains, fill out a simple form, and get ready-to-use inboxes in under 60 seconds.

Mailscale takes care of the technical setup like SPF, DKIM, and DMARC, automatically and gives you inbox credentials that can be plugged into any cold email sending tool. 

Key Features

• Instantly creates large numbers of email inboxes for cold outreach
  
  
• Automatically handles SPF, DKIM, DMARC, and domain setup
  
  
• Provides ready-to-use inbox details in a CSV file
  
  
• Works with most cold email sending tools via SMTP and IMAP
  
  
• Uses self-hosted email infrastructure owned by Mailscale
  
  
• Includes automated monitoring for reputation, bounces, and spam issues
  

Pricing

Mailscale pricing is based on the number of inboxes you create.

• Inboxes can cost as low as $1 per inbox per month
  
  
• Domains typically cost $10 to $15 per year when purchased through Mailscale
  
  
• Plans can be upgraded at any time
  
  
• You can cancel your subscription anytime
  

Mailscale does not charge based on the number of emails you send, but recommends sending 30 to 50 emails per inbox per day to protect deliverability.

Mailscale Pros

• You can create hundreds of inboxes in under a minute, which saves a lot of setup time.
  
  
• Inbox creation is much cheaper compared to Google Workspace or Outlook, especially when scaling volume.
  
  
• The platform handles SMTP servers, IP pools, and monitoring internally, so you do not have to manage infrastructure yourself.
  

Mailscale Cons

• Mailscale only creates inboxes, so you still need a separate tool for sending campaigns and warming up inboxes.
  
  
• The infrastructure is fully managed for you, which means you have limited visibility or control over IP-level behavior.
  
  
• It is better suited for teams running high-volume outbound, so for very small or low-volume setups, it becomes expensive to scale. 

• Deliverability still depends on how you send emails, so poor copy, high volume, or bad warm-up practices can still hurt inbox placement.

5. Maildoso 

Maildoso is a cold email infrastructure provider built for outbound teams that want to diversify their setup using both SMTP and Google Workspace mailboxes.

It allows you to create both SMTP-based inboxes and official Google Workspace inboxes, or use a mix of both. 

This makes it easier to spread sending risk and test different setups instead of relying on just one inbox type.

Maildoso handles the technical setup like SPF, DKIM, and DMARC for you and helps manage inbox health through monitoring and placement checks. 

For teams running cold outreach at scale, this flexibility can make deliverability easier to manage over time.

If you are running Google Workspace or MS 365 inboxes, keeping an eye on inbox placement is important. 

Pairing your setup with something like Warmforge can make it easier to spot deliverability issues early.

Key Features

• Supports both SMTP and Google Workspace mailboxes
  
  
• Automatically configures SPF, DKIM, and DMARC during setup
  
  
• Exports mailboxes directly to tools like Instantly and Smartlead
  
  
• Offers API access for automated mailbox creation
  
  
• Includes IP rotation and automatic replacement for SMTP inboxes
  
  
• Runs inbox placement tests and shows mailbox health scores
  

Pricing

Maildoso pricing depends on the mailbox type and billing plan.

• Mailboxes start at around $1.8 per mailbox per month
  
  
• Domains cost $12 per year when purchased through Maildoso
  
  
• You can choose SMTP, Google Workspace, or a combined setup
  
  
• Custom plans are available for higher volumes
  
  
• A 30-day money-back guarantee is offered for new users
  

You pay for mailbox licenses, not individual inbox accounts, so mailboxes can be deleted and recreated without extra cost.

Maildoso Pros

• You can use SMTP inboxes, Google Workspace inboxes, or a mix of both, which helps diversify your sending setup.
  
  
• SMTP inboxes are built specifically for outbound and run on Maildoso’s own servers and IPs.
  
  
• If a mailbox gets burned, it is automatically disconnected so it can recover without hurting the rest of your setup.
  

Maildoso Cons

• SMTP inboxes have lower daily sending limits compared to some other setups, which can slow scaling.
  
  
• Sending to personal email providers like Gmail or Yahoo may require Google Workspace inboxes instead of SMTP.
  
  
• Managing different inbox types (SMTP and Google) can add complexity for beginners.
  
  
• You still need to follow proper warm-up and sending practices to maintain good inbox placement.
  

Personalized Outbound Strategy

Get The Right Outbound Strategy In Minutes

Enter your email to get a custom plan & stack recommendation for your business

Generate my personalized plan

It's being carefully crafted by AI

Please check your mailbox in 5 minutes

Conclusion

If Mailerr inboxing starts to drop as you scale, choosing the right infrastructure becomes important.

• Mailforge is a strong alternative built for cold email infrastructure. It offers automated DNS, scalable domains and mailboxes, and shared IPs optimized for outbound
  
  
• Infraforge suits teams that want more control. It offers dedicated IPs, optional pre-warmed mailboxes, and real-time deliverability monitoring
  
  
• Inframail works well for teams using Microsoft-based inboxes who want unlimited inboxes under a flat plan with quick setup.
  
  
• Mailscale is useful if your priority is speed and volume. It lets you create a large number of inboxes very quickly compared to manual setups.
  
  
• Maildoso is a good option if you want flexibility beyond Mailerr. It allows you to mix SMTP and Google Workspace inboxes to spread sending risk.
  

If you want to move beyond Mailerr and scale cold email safely, Mailforge is ready to send infrastructure at an affordable cost of $3-$2 per mailbox.

It simplifies setup, focuses on deliverability, and scales unlimitedly.

Get your cold email infrastructure live and ready to scale in minutes with Mailforge.