Apps with 'SMTP integration' feature

Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.

Disroot is a platform providing online services based on principles of freedom, privacy, federation and decentralization.

Zoho Mail is an integrated email suite for modern enterprises, complete with Calendar, Notes, Tasks, Contacts, and Bookmarks.

Free open source Zendesk & Help Scout alternative: help desk, shared mailbox, email management and analytics. FreeScout is a pure PHP7+MySQL application which can be easily deployed even on a shared hosting.

Interlink Mail & News is a free e-mail client based on open source community code built on the Unified XUL Platform. It is available for Microsoft Windows and Linux (with other operating systems in development).

SendPulse maximizes the core metric of e-mail marketing - newsletter open rate - atomatically. We collect tons of data about billions of subscribers in our system and predict the best time and channel for each subscriber when to deliver the next message to him.

The Bat! is a secure email client software, built to protect your correspondence against third-parties.

hMailServer is a free e-mail server for Microsoft Windows. Its used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the world.

SurveyLab is online survey software for any kind and size of business. Whether you are in marketing research, customer experience or employee insights this is tool you need to have.

Mailjet is an email service provider that works with brands like Microsoft, Etsy, Product Hunt, Toast to help create, send, and optimize marketing and transactional emails.

Ethereal is a fake SMTP service, mostly aimed at Nodemailer users (but not limited to). It's a completely free anti-transactional email service where messages never get delivered.

LittleLink Custom is an open source self-hosted alternative to services like Linktree and many.link. LittleLink Custom allows you to link all your social media platforms easily accessible on one page. No coding or command line knowledge required. Just easy plug and play.

Respond is a business messaging platform that connects contacts from any channel to every team. Respond allows customers to message you via any channel and provides a 360 degree view to every team in the company. The #1 Business Messaging Platform.

SalesHandy is sales engagement platform. It provides email tracking, mail merge, document tracking & email scheduling. It allows user to send mass personalized email using mail merge, from gmail or their own SMTP servers.

Platformly is a powerful yet easy to use business management and marketing automation tool for busy business owners who are focused on growth.