Best Inframail.io Alternatives to Keep in Mind

by Maildoso's team

05/28/2025

difficulty level ⭐⭐

Inframail.io is known for its email security and deliverability tools, but it's not the only option. Whether you're seeking better support, more features, or flexible pricing, there are several strong alternatives available. In this guide, we highlight the top competitors worth considering to help you find the right fit for your email infrastructure needs.

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1. Maildoso

We provide infrastructure tools designed to support large-scale cold email campaigns for B2B teams. Our platform enables users to set up hundreds or even thousands of mailboxes in minutes, complete with pre-configured domains and necessary DNS settings like SPF, MX, and DKIM. The aim is to reduce the technical workload associated with launching outbound campaigns while maintaining reliable deliverability.

We include automated IP rotation and domain management to help keep messages out of spam folders. Users can manage all email traffic through a central inbox and benefit from features like domain forwarding, AI-based email warm-up, and campaign auditing. Our service is compatible with various cold email tools and designed to simplify the process of scaling outreach while retaining control over all owned domains.

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2. Mailscale

Mailscale offers tools to support automated cold email outreach by simplifying the process of email account creation. The platform was created to eliminate time-consuming tasks involved in setting up multiple mailboxes, helping businesses scale their email campaigns more efficiently. Their system focuses on reducing the setup time and technical barriers associated with managing large numbers of email accounts.

The company provides infrastructure that allows users to create and manage email accounts at scale without dealing with the manual configuration of each one. Their services are targeted toward businesses that want to avoid high costs from traditional email platforms and reduce the complexity of email infrastructure for outreach efforts.

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3. Mailforge

Mailforge provides cold email infrastructure services for businesses of all sizes, with a focus on fast setup and reliable deliverability. Their platform supports automated setup of domains and DNS settings, allowing users to create large numbers of mailboxes in minutes. The service is designed to work with various cold email tools and sending platforms.

Mailforge supports bulk updates, domain transferring, and multiple workspaces, making it suitable for teams that manage outreach at scale. They also offer features such as SSL, domain masking, and an option for dedicated IP infrastructure under their Infraforge product. The platform emphasizes simplicity and scalability while offering compatibility with different technical setups.

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4. Mission Inbox

Mission Inbox is a platform built specifically to support cold sales emails, unlike traditional email services that often restrict such use. They allow users to create inboxes quickly or use their own SMTP setup, with automated DNS integration through providers like Cloudflare and GoDaddy. Their infrastructure is designed to scale from small to high-volume campaigns.

The system includes components such as an inbox layer, deliverability tools, and outbound management, giving users control over their sending process. It is aimed at sales teams, agencies, and SaaS platforms looking to manage cold outreach with flexibility and without relying on external compliance tools. API access is available for custom integrations.

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5. Superwave

Superwave offers infrastructure for outbound email campaigns, focusing on fast deployment and scalability. They enable users to set up domains, create inboxes, and start sending cold emails within a short timeframe. Their service is used by sales teams, agencies, and growing companies that require high-volume email sending capabilities. They support full compatibility with tools like Smartlead and Instantly, and allow users to monitor and manage bounce rates using a rotating inbox system.

The platform helps businesses operate with no shared IPs and includes a slot system for replacing underperforming domains. Superwave aims to reduce downtime and simplify deliverability troubleshooting by centralizing bounce rate tracking and inbox management. 

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6. Saleshandy

Saleshandy is a cold email platform that helps businesses run personalized outreach campaigns using automated email sequences. The system supports multi-step sequences, AI-powered variants, and follow-up emails triggered by recipient behavior. It includes detailed analytics to help users track performance and adjust their messaging for better engagement.

Saleshandy also provides tools for lead finding, email warm-up, sender rotation, and a unified inbox. Its features are built to support sales teams, agencies, and businesses looking to manage cold outreach in one platform. Integration with tools like Gmail and Outlook is available, and users can schedule sends based on recipient time zones.

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7. DoYouMail

DoYouMail offers email infrastructure built for cold outreach, focusing on simplified setup and cost-effective scalability. Their platform provides automated DNS configuration, including SPF, DKIM, and DMARC records, which helps users launch campaigns quickly without technical experience. It supports unlimited inboxes and domains at a flat monthly rate and assigns dedicated IPs for improved deliverability.

The service is compatible with all major cold email tools and integrates easily into existing tech stacks via SMTP and IMAP. By eliminating per-inbox fees and automating infrastructure setup, DoYouMail targets agencies and sales teams that need to scale outreach without increasing overhead or managing complex configurations.

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8. Reply.io

Reply.io is a platform focused on sales engagement and outreach automation. They offer tools designed to help businesses manage and automate their communication with prospects and customers. Their platform provides access to real-time data, including a database of over one billion B2B contacts. It enables users to perform audience discovery, contact enrichment, and manage multichannel communication through emails, social media, calls, SMS, and other connected channels. Reply.io also integrates meeting scheduling features and supports CRM synchronization to streamline the sales process.

Reply.io supports both human-led and AI-led outreach efforts. Their services include email deliverability tools, an AI SDR (Sales Development Representative) agent, and multichannel conditional sequences. Users can automate LinkedIn and SMS outreach and take advantage of features like AI personalization and AI-generated responses. The platform offers integrations with various tools and CRMs and provides an API for custom workflows. 

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9. Inboxbooster

Inboxbooster focuses on helping businesses resolve email deliverability issues. Their process begins with access to the client’s DNS and email system to identify misconfigurations and potential causes of spam filtering. After diagnosing issues, they help with bounce and block resolution, content analysis, and reputation recovery strategies.

Their platform includes a patented content-analysis tool that checks how emails perform across different spam filters. They also offer strategic guidance on improving domain reputation and provide a money-back guarantee if clients are not satisfied. The service is structured to allow for ongoing iteration and monitoring over a typical three-month engagement.

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10. Mailreef

Mailreef provides a dedicated email infrastructure tailored for cold outreach. Their platform offers a private mail server environment with no shared IPs and unlimited inboxes. Users maintain full control over domains, mailboxes, and sending practices, which allows them to manage deliverability and reputation more directly.

The system is built to support businesses that send large volumes of cold emails and need reliable uptime and performance. Mailreef also includes live support from deliverability experts and simple domain setup. Their infrastructure integrates with external cold email tools and removes the need for workaround methods like fake accounts or shared IP pools.

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11. QuickMail

QuickMail is a platform that helps users manage cold outreach across email and LinkedIn. They support multi-channel outreach by allowing integration of unlimited email accounts and LinkedIn profiles, with automatic sender rotation to balance sending volume. The tool is built to serve teams that want centralized control over outreach campaigns and replies while improving deliverability and performance tracking.

QuickMail includes features like a unified inbox, email warm-up, deliverability insights, and AI-based message rewriting. It supports integrations with CRMs and lead management tools and offers team-based access management. The platform is used by lead generation agencies and teams that need scalable outreach without switching between multiple tools.

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12. Smartlead

Smartlead provides an email outreach platform designed to automate cold campaigns at scale. It supports unlimited mailboxes, AI-based warm-ups, and sender rotation to maintain deliverability and reduce manual tasks. Smartlead allows users to manage their entire cold outreach process from one interface, including tracking leads, analyzing campaign results, and responding to replies through a single inbox.

The system includes tools for behavior-based automation, campaign sequencing, and spam protection. It integrates with CRMs and third-party tools, and users can also deploy it as a white-labeled solution. Smartlead serves a wide range of users from sales leaders to marketing agencies and recruiters who need to scale outreach.

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13. Instantly

Instantly is a cold email outreach tool built for scaling campaigns and improving reply rates through automation and deliverability tools. It allows users to add unlimited email accounts, monitor sender reputation, and use AI features to personalize and optimize email content. The platform supports large-scale outreach efforts while providing tools for tracking results across different stages of the sales pipeline.

Users can manage all conversations through a centralized inbox and access detailed performance analytics tied to real business metrics. Instantly also offers resources like campaign templates and access to a private user community. The platform is aimed at agencies, freelancers, and businesses that want to streamline cold outreach and manage everything in one place.

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14. Woodpecker

Woodpecker is a cold email platform designed to manage outreach campaigns from start to finish. It provides users with tools to verify email addresses, warm up sender domains, rotate inboxes, and write personalized cold emails. Their system aims to help users keep emails out of spam folders through features like adaptive sending, centralized inbox access, and deliverability monitoring.

The platform includes built-in email verification and warming tools, allowing campaigns to start smoothly without relying on third-party services. Additional functions such as domain setup, B2B lead finding, and an agency dashboard are available as add-ons. Woodpecker also supports various integrations for automation and CRM connections.

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15. GMass

GMass is a Gmail-based tool for sending cold emails and marketing campaigns directly from a user's inbox. It integrates with Google Sheets for mail merge personalization and includes features like automatic follow-ups, scheduling, and detailed reporting. GMass is built for users who prefer working inside Gmail while still needing mass email capabilities and automation.

The tool allows users to send large volumes of emails by distributing sending across multiple accounts and includes spam check tools to reduce the chance of messages landing in junk folders. It also provides reply management and lets users build email lists from past Gmail activity. GMass is often used by small teams and individual users looking for simple cold outreach.

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16. Mailshake

Mailshake offers a platform for managing cold email and LinkedIn outreach in one place. It is designed to help sales teams create, launch, and track outreach campaigns without switching between multiple tools. The platform supports automated email sequences, lead engagement tracking, and integration with CRM systems.

Users can combine email and LinkedIn steps into a single workflow and monitor campaign performance in real time. Mailshake also includes tools for reply handling, A/B testing, and automated follow-ups. It is used by businesses that want a straightforward system for running multichannel outbound campaigns.

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17. Lemlist

Lemlist offers a multichannel outreach platform designed to help sales teams find leads, personalize communication, and automate their outreach across email, LinkedIn, and phone calls. The tool allows users to identify and enrich contact information using a built-in lead database, then build sequences that include follow-ups and actions across multiple platforms from one place. They also provide built-in email warm-up tools to support deliverability.

The platform focuses on automating personalized outreach at scale while helping users avoid spam folders. Features like lemwarm, advanced personalization through AI, and centralized tracking across all channels support sales workflows. lemlist integrates with popular tools like HubSpot and Aircall, allowing teams to manage and optimize outreach from a single system.

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18. Klenty

Klenty is a sales engagement platform that automates outreach across email, phone, SMS, and LinkedIn. It supports multi-channel cadences, auto-dialers, and inbox rotation to help sales reps connect with leads across different platforms. AI-driven features like call transcription, voicemail detection, and talk track adherence help improve efficiency during phone outreach.

The platform includes tools to personalize outreach with AI, manage prospect activity across channels, and keep CRM systems updated through direct integrations. Klenty is used by teams looking to reduce manual tasks, increase contact rates, and streamline outbound workflows with automation and reporting tools.

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Conclusion

Choosing the right alternative to Inframail.io depends on your specific outreach needs, budget, and technical setup. Whether you're looking for infrastructure-focused platforms, tools with multichannel capabilities, or services built directly into existing tools like Gmail, there are plenty of options available. Each solution has its own approach to email deliverability, automation, and campaign management.

Before making a decision, it's important to consider factors like ease of setup, integration support, scalability, and how much control you need over your sending environment. Taking time to test a few platforms can help you find the right fit for your outreach goals without compromising on performance or reliability.

Double your outbound sales with Maildoso!

We provide the infrastructure for cold outreach with the highest possible deliverability. Forget about the spam folder—set up hundreds of mailboxes in just 10 minutes, starting at only $1.80/month!

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