Mail-in-a-box Alternatives (September 2025)

Windows mail server software with webmail, caldav, carddav, antivirus, spam filtering - Fast, secure email server software for windows. Download free mail server trial.

RainLoop Webmail - Simple, modern & fast web-based email client.

Easy to Install and manage, carrier class Mail Server Software with modern fast WebMail interface, spam protection and much more.

Reliable, secure, extensible, and customizable mail server software platform made for on-prem and cloud-native deployment; easily scalable, smart licensing.

A powerful email server that blocks 99% of junk emails. It also enables encrypted emailing with large sized file sharing and helps in preventing IP leakages

Secure Windows or Linux mail server that includes chat, calendaring and contacts and offers a cost-effective alternative to Microsoft Exchange.

Email Delivery Platform to test, send and control email infrastructure in one place. Great for dev teams. Start today - Sign Up free!

Emails, calendars, contacts, tasks, chat and more

Send your Transactional and marketing Emails safely, track your results and use powerful APIs designed for devolopers by developers. Try for free

MagicMail is the top selling, carrier-grade email server built for ISPs, Telcos, and Cable companies to manage your back-end services for email.

Integrate in minutes and send transactional emails via our REST API or SMTP. Scale with our reliable global infrastructure and deliver emails to your customer's inbox instantly.

The MDaemon Email Server is trusted by businesses in over 140 countries to provide a secure, reliable, and affordable alternative to Microsoft Exchange or Microsoft 365. IT professionals recommend MDaemon as an easy-to-use, reliable, and secure mail server that does not require expensive administration or impose high per-user costs. On-premise or hosted email deployment.

Mailosaur removes the frustration of testing everything a user might do. 
Test password resets, replies, two-factor logins, and more.

Incoming Email for your Web Application, send and receive email via HTTP Post in the Cloud

Email Mailing List Manager. Easy To Use and Extendable

Cost-effective, secure hosted email: mailboxes, calendar and address book

Send bulk, transactional, & marketing emails with our easy-to-use and reliable SMTP. Check the quality of email and improve delivery. Get started for free!

Boost your email deliverability and engagement with Inboxroad. Our comprehensive solutions and expert guidance ensure your messages reach the inbox - Inboxroad

EmailSuccess is a reliable, fast and secure Mail Transfer Agent capable of delivering huge volumes of emails to the biggest email service providers.

Mailspring: The open-source, extensible email app for Mac, Linux, and Windows with open tracking, link click tracking, contacts enrichment data and more.

OX Cloud Email - Easy, Fast, Secure - Powerful email built for business

SMTP2GO is the scalable, reliable email deliverability solution. Worldwide servers, a robust API, and powerful reporting set us apart. Try our free plan!

Start sending emails with our top-rated service. Sign up for free now to streamline your email sending process with API or SMTP.

An essential suite of email and web security services for SMB and Enterprise.

Fast, private email hosting for you or your business. More productive, lightning fast, simple and built to save you time.

MailChannels ensures your customers' emails are always delivered. Trusted by the fastest-growing hosting providers.

BlueMail is a modern, mobile and desktop, powerful Email management tool with a sleek design, unified inbox and support for all your accounts: IMAP, Exchange,POP3.

Fast, secure, and sustainable email services provided by email professionals. Powerful Email and Domain Hosting for businesses and organizations.

We are the Experts in Email Archiving: Innovative Email Archiving Solutions for small and medium-sized Businesses.

Test new user signups, transactional emails, spam scores, and more. Get started on our free forever plan with unlimited email addresses and mailboxes.

Mailprotector has the complete email security products your users need to cover all three comprehensive pillars: email security, encryption, and privacy.

Zimbra: A Cloud-Hosted Collaboration Software and Email Platform That Integrates With Proprietary Business Solutions

Host your professional email on a secure, privacy-guaranteed, and ad-free email hosting service built-in with features like email marketing services can do.

Proton Mail is the world’s largest secure email service with over 100 million users. Available on Web, iOS, Android, and desktop. Protected by Swiss privacy law.

Niezawodne Email API i SMTP w chmurze. Najwyższa dostarczalność i szczegółowa analityka wiadomości email wysyłanych z Twojego systemu lub aplikacji.

Simple group email discussion lists for your club, association, office, society, family and more. Get started in minutes. 14-day free trial.

Mailfence is the only secure and private email service that gives you control. A free, interoperable encrypted email service protected by Belgian privacy law.

Postbox is the power email app for busy professionals, like you.

Enterprise-strength tool for automating both mass-mailing and single email processing jobs.

Set up email forwarding in seconds and start receiving and sending emails with your domain name. Absolutely free. No registration. 24/7 Support.

Email delivery, perfected with Mailtinni! 💌 Your new SMTP service: fast, reliable, highly secure. 🚀

Batch your emails into manageable daily, weekly, or monthly digests.

Mailtrim provides secure Free email client software with its unique team collaboration Feature and is designed to serve the mailing needs of all business

Save on infrastructure and maintenance costs. Choose your data centre (US, EU, APAC). AWS native cloud email hosting.

Ad-free Business Email Hosting with a clean, easy-to-use interface. Integrated Business Calendar, Contacts, Notes, Tasks. Free for up to 5 users.

Home

Elastic Email is a marketing platform, built on the most cost-effective delivery engine. Join tens of thousands of companies, which already send their emails!

Secure E-Mail Boolebox: to send and receive encrypted messages and attachments using the advanced security features of Boolebox. Learn more!

#1 Open Source Free Anti Spam and Antivirus software. MailCleaner is a gateway between your mail infrastructure and Internet. Block all spam.

Securely archive, search, and analyze your company's email on one platform, preserving vital data while gaining instant business insights.

Secure hosted email with custom domain. Shared calendars, chat, storage, documents & apps. The only solution integrated and working together in one screen.

CloudFiler, secure and easy email filing for all devices running Microsoft Outlook

Run your email campaigns with the best email warm up tool provided by inboxigniter & keep emails away from spam folder. Register today!

Discover Alinto, email solutions for organisations and service providers. ensure the deliverability, management and the security of your emails.

The Beeble Project is email and online cloud storage platform with unprecedented security and privacy without third party access.

Launch Your Own Email Service Provider and Email Marketing Agency. Sell it to your customers and clients, or use it in-house.

A suite of email marketing tools to monitor Inbox placement, Deliverability, IP health and Sender Reputation, compatible with all Email Service Providers.

Exchange business-class email helps increase user productivity while protecting your data. Get it as a hosted service or run it on your servers.

N-able SpamExperts offers professional anti-spam email filtering and archiving for Web hosting providers, Internet Service Providers and Telcos.

Email API and SMTP relay to not just send and measure email sending, but also alert and optimise. We provide you with tools, expertise and support needed to reliably deliver emails to your customers inboxes on time, every time.

Amazon WorkMail provides secure, managed business email and calendaring with support for existing desktop and mobile email client applications.

Archive, manage, and secure your organization's email with archiving software designed specifically for Exchange.

Powerful Transactional Email APIs that enable you to send, receive, and track emails, built with developers in mind. Learn more today!

N-able Mail Assure offers MSPs AI-driven email security with close to 100% filtering accuracy. Mail Assure also provides continuous uptime and email archiving.

Explore AuthMailer transactional email service! Discover its features, pros, and cons to send transactional emails.

Ispmanager is a Linux-based control panel for managing dedicated and game and VPS web servers, as well as selling shared hosting

Email made easy and beautiful. Manage multiple accounts with the best email client for Windows 2024. Download the #1 email client program free Now.

Secure, private email hosting service for business or family with mobile sync apps for calendar, contacts, tasks, and notes. Get your private email account.

Email archiving, e-discovery, compliance and forensics software that helps retain, organize and mine email data

Inbox Zero is your AI personal assistant for email and the quickest way to reach inbox zero. Automate your email, bulk unsubscribe from newsletters, block cold emails, and view your email analytics. Open-source.

Mailbutler is the email software extension plugin for Apple Mail, Gmail, and Outlook that helps you stay productive and professional.

Spambarrier ist ein Dienst, der Ihre E-Mails filtert, bevor sie Ihren Mailserver erreichen. Der einfache Weg, sich vor Spam zu schützen Hosting sicher in Deutschland und datenschutzkonform.

JangoSMTP - Transactional Emails Made Easy. Highest Inbox Results. Live US-Based Support. API and SMTP Relay Sending.

DriveHQ is the first Cloud IT service provider with 18 years of track record. Our service incl. Cloud File Server, WebDAV Drive Mapping, Online Storage, Backup, File Sharing and FTP Hosting. Sign up a free account or try our business service for free.

SMTP email relay service that is powerful, secured and reliable. Send better transactional emails and integrate easily with our email API.

Buy SMTP service. 99% Inbox. Free to test. Best price/quality SMTP offer. Buy with Bitcoin. Send, receive, route/forward emails.

Mesh is the world's first email security platform built exclusively for MSPs, enhancing their efficiency and ensuring greater safety for their customers. Offering flexible deployment options - Mesh Gateway (MX based), Mesh 365 (API based), and Mesh Unified (MX and API based) - Mesh protects organiza

InMoat puts you back in control of your inbox. Tailor your inbox with readymade email filters, designed by experts, and let your inbox work for you. Win back time, maintain focus, and be more productive.

Partner with Australia's #1 wholesale domain name and web hosting provider today. Begin selling cPanel web hosting services to your customers from our fully managed and secure Dell Cloud infrastructure based in Australia.

You'll never look at email the same way again. Eight years ago, we first reimagined email. Now, we've done it again. Request early access today.

Simple and powerful email verification JSON API using SMTP, typo checks, syntax validation, and free and disposable provider filtering. Free for personal use.

Single Mailbox Recovery (SMBR) software allows you to restore and recover mails or mailbox instead of the complete Exchange Database.

Take your email outreach to new heights with trusted email deliverability software. Start today and watch your inbox placement rates soar.

This reliable and secure transactional email service by Zoho Mail ensures guaranteed and fast delivery of transactional emails, and comes with a pay-as-you-go pricing plan.

SFTPCloud is a scalable and highly-available service for creating secure, managed SFTP and FTP servers powered by the cloud storage of your choice.

Leading mail server and webmail client, XGenPlus offering fast, secure, and reliable emailing services supporting linguistic domains - World's first enterprise email solution.

Random email address and phone number generators. Use SMS and email in otp tests, 2fa verification, and marketing.

The powerful email verification tool helps you validate and clean your email list seamlessly, ensuring verified email subscribers and high deliverability.

Bouncify is a Leading provider of bulk email list cleaning and email verification service. Run our bulk email verification tool through your list of emails to remove hard bounces and keep your mailing list clean and engaged with 99% accuracy. We provide email list validation to marketers from all countries.

Secure Mails, 500Mail by 500apps, get safe, encrypted, ad-free emails, and never worry about transmitting personal information again.

The best email deliverability tool to raise your reputation and stop landing in spam. Reach the inbox and get better email results with MailReach.

K-9 Mail is an open source email client focused on making it easy to chew through large volumes of email

SQL Server, MySQL and PostgreSQL Backups made easy with SQLBackupAndFTP. All Backup types, Encryption, Compression, Scheduling, Email notifications, Sending to Folder, FTP or Cloud

Libraesva Email Archiver is a powerful and simple solutionfor email Governance, Risk and Compliance. it provides rapid e-Discovery with instant full-text search.

Encrypt ANY Business or Personal Email in a few minutes. No need to switch email providers. Free encrypted email for Gmail, Yahoo, Microsoft.

PHP cloud server control panel that support Digital Ocean, Linode, AWS, Vultr, Azure and other custom VPS. Git deployment webhook and easiest control panel to manage Laravel, Cake, Symphony or WordPress.

Cryoserver is an email archiving solution which preserves your email in a tamper-evident archive, turning your data into a useful archive for everyday use.

Freshdchat API

Amazon Simple Email Service (SES) is a cost-effective, flexible, and scalable email service provider that allows developers to send email from within any application.