AuthSMTP
AuthSMTP is the outgoing SMTP email service for e-commerce websites, mailing lists or email applications.
Some of the top features or benefits of AuthSMTP are: Reliability, Security, Deliverability, Ease of Use, and Support. You can visit the info page to learn more.
Best AuthSMTP Alternatives & Competitors in 2025
The best AuthSMTP alternatives based on verified products, community votes, reviews and other factors.
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Open-Source Alternatives.
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turboSMTP is a reliable, powerful, easy-to-use SMTP server that maximizes the deliverability of all...
Key turboSMTP features:
Ease of Use Reliability Customer Support Analytics and Reporting
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SMTP provides scalable affordable email infrastructure for all your sending needs.
Key SMTP features:
Reliability Scalability Analytics Integration
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Warmup Inbox is a tool that automates the process of warming up your email inboxes, raising your sender reputation and inbox health automatically.
Key Warmup Inbox features:
Automatically warms up domain to be ready for cold email Improve Email Deliverability Improve Domain Reputation Improve IP Reputation
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SMTP2GO is the scalable, reliable email deliverability solution. Worldwide servers, a robust API, and powerful reporting set us apart. Try our free plan!
Key SMTP2GO features:
Reliability Global Infrastructure Detailed Reporting Easy Integration
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WP Mail SMTP is an online platform that facilitates users with multiple facilitation.
Key WP Mail SMTP features:
Improved Email Deliverability Easy Configuration Broad Integration Email Logs
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EmailSuccess is an advanced MTA built to handle the most critical reliability, performance, security, and deliverability requirements.
Key EmailSuccess features:
Scalability Deliverability Advanced Analytics Integration Capabilities
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Google's encompassing suite of cloud-based business apps.
Key Google Workspace features:
Integrations Collaboration Cloud Storage Security
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Jira Service Management is an online development platform that facilitates users with multiple services.
Key Jira Service Management features:
Integration with Atlassian Suite Customizable Workflows Automation Capabilities Scalability
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Learn why more developers choose SendGrid for their email deliverability service to send transactional emails triggered by web apps. Get started for free.
Key SendGrid features:
Scalability API Integration Deliverability Analytics
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Postmark is the easiest and most reliable way to be sure your important transactional emails get to the inbox. Simply & reliably parse recieved email to JSON for your webapp.
Key Postmark features:
High Delivery Rates Fast Sending Speed User-Friendly Interface Detailed Analytics
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CritSend is a SMTP relay for developers.
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Mandrill is a new way for apps to send transactional email. It runs on the delivery infrastructure that powers MailChimp.
Key Mandrill features:
Scalability Deliverability Integration Analytics
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Email Validation & Email Verification reduces bounce rates up to 98%. Rapidly verifying email addresses has never been easier, just drag drop and deliver!
Key BriteVerify features:
Accuracy Speed Ease of Use API Integration
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Marketing & transactional email delivery platform.
Key SocketLabs features:
Deliverability Scalability User-friendly Interface Analytics and Reporting
AuthSMTP discussion
