Poste.io
You can have a fully functional mail server installed in a few minutes, mostly waiting for scripts to do the work. The whole package is designed with reasonable defaults to get you up and running quickly, without having to know the internals and without making decisions that could break the email system.
User data and configuration is strictly separated from binaries. User database is stored in SQLite database - in file. This makes Poste.io fully compatible with external storage. Migration, backups or updates are therefore very easy and mostly consist of files manipulation.
Poste.io has been built from the ground up with security in mind. Internet history is littered with painful security incidents, so we traded old email client compatibility and insecure authentication methods for features that meet today's for features that meet modern security requirements.
Learn more
Mailu
Mailu is a simple yet full-featured mail server as a set of Docker images. It is free software (both as in free beer & as in free speech), open to suggestions and external contributions. The project aims at providing people with an easily setup, easily maintained and full-featured mail server while not shipping proprietary software nor unrelated features often found in popular groupware.
Main features include:
Standard email server, IMAP and IMAP+, SMTP and Submission with autoconfiguration profiles for clients
Advanced email features, aliases, domain aliases, custom routing
Web access, multiple Webmails and administration interface
User features, aliases, auto-reply, auto-forward, fetched accounts
Admin features, global admins, announcements, per-domain delegation, quotas
Security, enforced TLS, DANE, MTA-STS, Letsencrypt!, outgoing DKIM, anti-virus scanner, Snuffleupagus, block malicious attachments
Antispam, auto-learn, greylisting, DMARC& SPF, anti-spoofing
Learn more
Dovecot
Dovecot is an excellent choice for both small and large installations.
Dovecot is among the best performing IMAP servers while still supporting the standard mbox and Maildir formats. The mailboxes are transparently indexed, which gives Dovecot its good performance while still providing full compatibility with existing mailbox handling tools.
Dovecot is standards compliant. Dovecot passes all IMAP server standard compliancy tests while most other servers fail many of them.
Dovecot’s indexes are self-optimizing. They contain exactly what the user’s client commonly needs, no more and no less.
Dovecot is self-healing. It tries to fix most of the problems it notices by itself, such as broken index files. The problems are however logged so the administrator can later try to figure out what caused them.
Dovecot tries to be admin-friendly. Common error messages are made as easily understandable as possible.
Learn more
MacSonik Gmail Backup Tool
Gmail Backup Tool for Mac is a perfect utility that effortlessly creates the backup of Gmail mailboxes and saves it to a different format like PST, PDF, MBOX, MSG on macOS. Even the application directly import Gmail emails to Office 365, Yahoo Mail, Hotmail, IMAP, etc. It allows users to backup the emails from the Gmail account on MAC OS X. Import Gmail emails to Yahoo, Thunderbird, Amazon Webmail, Icloud, Zoho Mail, etc. Option to set up a backup schedule of Gmail emails. It privileges a feature to free up the server space after the backup of emails. The maximum number of users are looking for a solution to backup their complete Gmail mailboxes in PST formats on a mockup of their MacOS. Here, Gmail Backup Tool for Mac is a top-rated application that helps users mail mailboxes in PST format. Gmail Backup Tool for Mac allows users to import their emails from Gmail to another Gmail account without losing a single piece of data.
Learn more
