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It is a mail transfer agent server that provides ESMTP, IMAP, POP3, SMAP, webmail, and mailing list services with individual components. It is best known for its IMAP server component. | Mailwarm is an automated email warmup and deliverability platform designed to help businesses keep their emails out of spam folders and consistently reach the inbox. |
Web-based administration and configuration tool;
Local mailboxes can be accessed via POP3;
Local mailboxes can be accessed via IMAP;
PAM, LDAP, PostgreSQL (beta), or MySQL authentication. LDAP authentication requires OpenLDAP to be installed. LDAP-based mail routing is also supported;
Authenticated SMTP;
XVERP and XEXDATA ESMTP extensions
| Automated Email Warmup, Spam Score Monitoring, Multi-Provider Warmup, Email Deliverability Analytics, One-Click Gmail,Outlook & Office365 Setup, Simplified SMTP Configuration |
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| No integrations available | |

An easy to use email app that saves you time and keeps your messages safe. Get your messages instantly via push notifications, read and respond online & offline, and find any message quickly.

It is the world's largest secure email service, developed by CERN and MIT scientists. We are open source and protected by Swiss privacy law

It is an application that is used mainly to send and receive emails. It can also be used to manage various types of personal data including calendar appointments and similar entries, tasks, contacts, and notes.

It is a free feature-rich email service with unlimited mailbox size. It has two-factor authentication and login history to prevent hacking. It scans all incoming mail for both spam, phishing, and malware.

Is an AI-driven multichannel outreach platform that reaches prospects where they're most active while keeping every message personal, timely, and effective.

Free email checker and email verification with 99.9% accuracy. Reduce bounces, protect sender reputation. 100 free email verification credits daily.

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

Free email verifier & checker to validate email addresses instantly. Reduce bounces and verify emails in real time.

Sidemail is an all-in-one email delivery platform for startups that makes sending emails simple. It has everything for delivering and managing emails – email API, transactional emails, email marketing and automation, contact management, no-code email editor, email templates, subscribe forms, and more. Perfect for teams & developers that want reliable deliverability without the bloat. We're based in the EU and GDPR compliant.

InboxKit automates your entire cold email infrastructure. Buy domains, provision Google Workspace and Microsoft 365 mailboxes, configure DNS, and export to 16+ sequencers — all from one dashboard. Scale from 10 to 10,000 mailboxes without the manual setup headache.