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It is a one stop email testing platform which helps improve the emails being sent from application and reduce the costs associated with email workflow testing. | Is a free, open-source SMTP testing tool built with Go and Vue. It provides a modern web UI for viewing and testing emails, and includes a REST API for integration testing. |
Email testing; Email quality; Email QA | Mail Testing, Multiplatorm, Lightweight, Simple |
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Litmus is a testing service for web and marketing professionals. It allows people to cross-browser test their websites, and test their email newsletters across a range of email clients and spam filters.

Email on Acid is the most affordable, self-serve email testing platform in the world. We can help you maximize the success of your email marketing efforts by diagnosing and improving your renderability, deliverability, click-throughs and conversions.

We offer one platform that covers all email-related needs in one place: testing, sending, and in-depth tracking to control how email infrastructure works and performs.

Disposable email and fake email capture for QA and development teams

Mailinator is a disposable email service that allows QA departments to test with 1000's of inboxes.

Get US-IP Google & Microsoft Workspace accounts from $2.5. 95% inbox delivery. Works with SmartLead, Instantly, Lemlist, SalesForge, Warmy & more.

MTN Email Verifier is a high-performance tool for ensuring that your email communications reach the right inboxes every time. With the rise of email marketing and automated outreach, maintaining a clean list of deliverable email addresses is crucial. MTN Email Verifier combines syntax validation, domain checks, and server-level SMTP verification to deliver a reliable, real-time solution.

KokoQuest helps users discover and build lists of real companies that match highly specific business criteria. It supports natural-language searches for manufacturers, suppliers, service providers, partners, or customers, and returns ranked company lists with relevance scoring. KokoQuest covers the full workflow from company discovery to contact enrichment and email drafting, allowing users to go from search intent to outreach-ready leads in one place. Through its Gmail integration, the AI can translate a user’s intent into a ranked list of relevant companies, automatically enrich each with contact details, and draft a personalized email ready to send directly from Gmail. Unlike static lead databases, KokoQuest is designed for niche and hard-to-define markets where coverage is inconsistent or incomplete. It is useful for finding regional providers, contract manufacturers, private-label partners, and specialized B2B services that are often missing from traditional sales tools.

Get a free disposable email address with Temp Mailin. Instantly receive emails, block spam, and protect your privacy. No registration needed.

MIA (Marketing Inbox Assistant) uses AI to automatically process marketing email responses, instantly routing high-intent leads to sales and handling compliance requests like opt-outs. It enriches your database from email signatures and out-of-office replies while supporting 60+ languages. MIA integrates with major platforms like Marketo, HubSpot, Salesforce, Google, and Outlook to eliminate manual inbox management.