SMTPServer Alternatives (September 2025)

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.

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

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

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

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

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

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

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.

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

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

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.

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

Discover AhaSend, the Email Service Provider dedicated to revolutionizing transactional emails. Enjoy hassle-free pricing at $0.50 per 1,000 emails and experience unmatched delivery times. No hidden fees, no brackets, just straightforward service designed for your peace of mind.

Everything you need for more successful email delivery and performance management, from simple sending tools to deeply informative reporting.

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

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!

UniOne is a transactional email service: you can send Transactional Emails simple and cheap with the help of platform API Email UniOne.

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

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

Streamline your emailing and boost your sales with Mailjet. We serve all your email and SMS needs with one simple and powerful service.

Take your email deliverability to the next level with AI-powered email warmup for unlimited mailboxes and comprehensive deliverability tests

Get rid of spam traps, bounces, disposable or catch-all emails with bulk email verifier or real-time API. Start with 100 FREE email verifications!

Keep your email list clean with our bulk email verification service. Verify daily 100 email address for free and avoid sending emails to spam / invalid account.

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

Free real-time email verification service. Easy to use. Start using in 30 seconds

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

Mailercloud is the ultimate platform for growing businesses, offering smart and intuitive email marketing tool to help you thrive in the digital world.

MailUp is your complete email and SMS delivery solution that combines powerful email marketing tools with SMTP relay and plugins for e-commerce, CRM, and CMS systems

Send professional bulk emails in no time with Selzy email marketing service. Track statistics. Conduct A/B-tests. Automate campaigns. 1500 emails free.

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

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

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

Use Mailmodo to create and send interactive emails your customers love. Drive conversions and get better email ROI. Sign up for a free trial now.

If you want excellent email deliverability, our services are highly dependable. Reach out to us for bounce checker and hunter email.

Email checker online tool. Ensure email accuracy with our efficient tool. Verify email addresses instantly and improve your communication reliability. Try for free!

Easily set up WordPress email delivery with advanced WordPress SMTP features and experience secure delivery of your WordPress emails. Get started free!

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.

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Whether you need to attract new customers with your next hot promotion or reliably communicate with your existing customers, Mailrelay is your best choice.

Improve domain reputation and increase the quality of your mailing list by validating emails before sending a campaign, or at the point of capture.

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

The Most Comprehensive Email Verification Service from only $59: Email Checker, Email List Verify, Bulk Email Verifier, ESP Integrations, and Automatic Email Verification

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

Send cold emails to countless inboxes using multiple auto-rotating email accounts and advanced AI warm-ups to avoid spam. Start your 14-day free trial.

Start sending transactional and marketing email in minutes. Easily scale to enterprise-volume with Twilio SendGrid’s Email API. Try it free!

Create your own marketing strategy Send in seconds Send & analyze email marketing campaigns. Start your free plan with unlimited credit. Free for a lifetime! Sign up for free See pricing INBOX is an email marketing tool with more powerful features and flexibility than any other Easy To Use Create a campaign in | Create email marketing your subscribers will admire INBOX

Magnetic Mailer is one of the Best AWS SES Email Sending Software available in the market. You can also use SendGrid API, Elastice Mail API and SMTP Settings.

Improve domain reputation and increase the quality of your mailing list by validating emails before sending a campaign, or at the point of capture.

Learn how to use Mailchimp Transactional Email to send targeted and event driven messages to anyone, fast—with best-in-class deliverability.

Bulk email verifier. Get rid of spam traps, bounces,and disposable emails. Start with 100 FREE email validations! Secure & accurate bulk email validation

MailboxValidator email validation clean email lists and reduces bounce. It connects to the mail server and checks whether the mailbox exists or not.

Trigger thousands of messages in minutes. Integrate seamlessly. Only pay for what you need. Try Brevo's Messaging API for free — no credit card needed.

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

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

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

Send Transactional and Promotional Emails in bulk using SendClean. Best Email Marketing and Email API Solution for Enterprises. White lable Email Solution.

Clean your email list with Mailercheck's email verification tool and improve deliverability with our email testing suite to boost email marketing ROI.

Warmbase email warmup tool raises your sender reputation by positively interacting with your email. Connect your email account within 2 min.

​​Multi-channel marketing automation platform with email, web push, SMS, and chatbots for Facebook, Telegram, WhatsApp, and Instagram — all combined in a free CRM.

Explore HandySends SendGrid Email API transactional email service! Discover its features, pros, and cons to send transactional emails.

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

Ensure deliverability and inbox placement for your transactional emails with Oracle Cloud Infrastructure Email Delivery, based on Dyn's Email Delivery technology.

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

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

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.

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

Take back control of your email with this easy-to-deploy mail server in a box.

Improve the deliverability of your cold email campaigns with our network of inboxes interacting with each other.

The most accurate bulk email checker. Complete email address verification in seconds. Clear lists with online mail checker for free.

Check the email newsletter spam score. Improve the deliverability of your emails with our free spam checker and tester tool.

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

Over 31,000 companies from 20 countries worldwide are already using KIRIM.EMAIL as their email infrastructure to generate more sales, build apps, and build

Build beautiful, responsive emails with Benchmark's email marketing platform to engage subscribers, nurture leads, and track results.

Email Mailing List Manager. Easy To Use and Extendable

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

The only deliverability tool you need. Find out why your email is going to spam and protect your sender reputation

Manage and email your subscribers for far cheaper with EmailOctopus. Drag and drop email builder, powerful analytics, bounce/complaint tracking and more.

The most accurate email validator algorithm to identify and remove bad email addresses. Best sales starts with a better email deliverability. Enjoy a free trial.

MaxBulk Mailer is a bulk email software and email marketing tool for macOS and Windows that allows you to send out customized press releases, price lists or any kind of text or HTML messages to your customers.

Email Address Validation and Email List Cleaning Service reduces bounce rates. Quick Email Verification Service is the right platform to verify email list and improve deliverability.

Best at verifying emails that are catch-all or protected by SEGs (Secure Email Gateway). Single email verifications are free and unlimited.

Improve your email deliverability with Bouncer's robust email verification and deliverability platform. 🌐

Verify your email list in minutes, or integrate real-time email verification into your app with our API. Over 18 billion emails verified. Get started for free.

No matter your level of expertise, we have a solution for you. At GetResponse, it's email marketing done right. Start your free account today!

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

Use real-time behavior data and AI to convert more customers with Mailchimp's marketing, automation & email marketing platform. Easy to use - start for free!

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

Premium email forwarding from ForwardMX ensures that your forwarded emails are delivered to your inbox. 7 day support. Get setup in minutes.

Use our Mail Tester to test email. Get 3 Free Spam Tests to check your Email Deliverability and spam score with our free email spam checker.

Email warming software. Improve email sender reputation by having AI-generated sales conversations in your inbox allowing you to bypass spam algorithms. Land in your prospects' inboxes, not in spam, and sell more.

MassMailer provides the best Mass Email solution for Salesforce CRM customers whose marketing, sales, and other teams need to send and track mass emails.

Rock-solid reputation and a reliable API with endless possibilities for sending your transactional emails.

Streamline your SPF record management, enable DMARC compliance, and improve your email deliverability by fixing the SPF 10 record limitation.

Newsletter software for people like you.

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

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

Un Servicio de Email Transaccional garantiza la llegada de los emails a tus clientes. Envia adjuntos con el Servicio de Email Transaccional con Doppler Relay.

Optimize your email strategy with ZeroBounce. We offer top-tier email validation, list cleaning, and address verification to reduce spam traps and enhance deliverability.

Email deliverability software guaranteed to boost email placement. InboxAlly’s real-time tracking and email warmup ensure your messages hit the inbox, not spam.