AuthSMTP Alternatives

turboSMTP is a reliable, powerful, easy-to-use SMTP server that maximizes the deliverability of all...

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

Email marketing software made for cold email marketing professionals. Using advanced AI to generate email personalization in seconds

Try for free paid Free Trial $99.0 / Monthly (Starter)

SMTP provides scalable affordable email infrastructure for all your sending needs.

WP Mail SMTP is an online platform that facilitates users with multiple facilitation.

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.

Open Source

Google's encompassing suite of cloud-based business apps.

Jira Service Management is an online development platform that facilitates users with multiple services.

Mandrill is a new way for apps to send transactional email. It runs on the delivery infrastructure that powers MailChimp.

EmailSuccess is an advanced MTA built to handle the most critical reliability, performance, security, and deliverability requirements.

Learn why more developers choose SendGrid for their email deliverability service to send transactional emails triggered by web apps. Get started for free

Email Validation & Email Verification reduces bounce rates up to 98%. Rapidly verifying email addresses has never been easier, just drag drop and deliver!

ServiceNow ITSM is a pure information technology service management system that leverages you with the set of workflows and tools that permits you to develop, deliver, and manage IT services professionally.

VoloMP is an email marketing platform for high-volume emailers. Ideal for affiliate marketers mailing to 500K+ a day.