AuthSMTP Alternatives

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

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

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

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.

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

Deliver your app and website emails on time and to the inbox. Trusted to send 25% of the world's non-spam email. Email delivery for companies big and small.

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

Marketing & transactional email delivery platform

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

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

SendForensics offers email analysis and deliverability solutions.

CritSend is a SMTP relay for developers.