Poste.io is a complete mail server: **SMTP + IMAP + POP3 + Antispam + Antivirus**, with **Web administration + Web email** — **on your server in ~5 minutes**.

## Fast deployment

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.

## Data has its own volume

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.

## Security

Poste.io has been built from the ground up with security in mind. SSL TLS everywhere! No personal data, emails, logins go through internet unencrypted. Whole mail server container is isolated by Docker from other apps.

## Built with Open Source

Installing Poste.io consists of three simple steps and takes only a few minutes to get a full featured, robust email server up and running.

## Features

- native implementation of SPF, DKIM, DMARC, SRS with simple wizard

- Antivirus engine for detecting trojans, viruses, malware (ClamAV)

- Built-in spam filter (RSPAMD)

- Webmail client on HTTPS (Roundcube)

- Email redirection, autoreply and other filtering by Sieve scripts

- Quota for limiting mailbox space or email count

- Web administration with different rights for system administrator, domain administrator, email owner.

- Built in autodiscovery for Microsoft products, Thunderbird...

- Diagnostics to help setup domain and mailserver properly

- SMTP - port 25, 465 (TLS), 587

- POP3 - port 110, 995 (TLS)

- IMAP - port 143, 993 (TLS)