Apps with 'SMTP Support' feature

Cross-platform email client providing POP/IMAP support, robust filtering, multiple accounts, and chat. Extendable via add-ons with RSS/Atom, etc.

Open-source client enhancing Thunderbird with more features and bug fixes. Offers security patches and multi-row descriptions like Outlook.

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

Zoho Mail is a secure, encrypted, and enterprise-ready email solution, a suite of apps tailor-made for your organization's needs.

LinkStack is an open source, self-hosted, highly customizable link sharing platform with an intuitive, easy to use user interface.

Open-source, self-hosted ERP for craft producers unifies inventory, order processing, production, purchasing, CRM, batch tracking, and calendar scheduling.

Geary is an email application built around conversations, for the GNOME 3 desktop.

Secure email hosting with webmail, IMAP, and POP protocols, ideal for individuals and businesses. Includes junk mail protection, file sharing, and 1Password integration.

Secure, private email with end-to-end encryption, no ads, tracking, or government surveillance, ensuring top-notch privacy under Belgium law.

Free open-source Zendesk & Help Scout alternative: help desk, shared mailbox, email management and analytics. FreeScout is a pure PHP8+MySQL application which can be easily deployed even on a shared hosting.

All-in-one solution for email, SMS, marketing automation, transactional messaging, integrations with CMS and e-commerce platforms, and tiered email-sending plans.

Handing out free email addresses on edgy/based/cringe domain names since 2021.

Email hosting & multi-domain mailbox management for businesses and agencies — forwarding/catch-all, deliverability stats, migration, webmail + IMAP/SMTP, and flexible plans (free + trial).

Combines email campaigns, SMS, web push, chatbots in a no-code interface with CRM, a course builder, sales automation, and advanced analytics.

Mailgun is email automation for developers. Use our REST APIs to effortlessly send, receive and track email from your website or application.

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

Scalable email delivery for transactional email SendGrid transparently handles DKIM, SPF, ISP rate limits, content inspection, bounces, and spam reports to help users achieve higher deliverability. SendGrid integrates in minutes by just changing three SMTP settings.

Forward Email is the best email service, encrypted email service, and fastest email service. It supports unlimited domains and aliases for no extra cost. It uses quantum safe ChaCha20-Poly1305 encryption and offers SMTP, IMAP, POP3, email webhooks, email regular expressions...

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.

MailHog is an email testing tool inspired by MailCatcher, but easier to install.

This free online service performs a deep analysis of the configuration of any SSL web server on the public Internet. Please note that the information you submit here is used only to provide you the service. We don't use the domain names or the test results, and we never will.

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.

grommunio (formerly known as grammm) efficiently combines all requirements of modern, digital communication and collaboration.

SMTP.com is an email infrastructure provider that helps deliver your emails to Internet Service Providers (ISPs). It improves your email delivery success rate by integrating your traffic into its reputable flow.

SquirrelMail is a standards-based webmail package written in PHP. It includes built-in pure PHP support for the IMAP and SMTP protocols, and all pages render in pure HTML 4.0 (with no JavaScript required) for maximum compatibility across browsers.