What is Poste.io?
Poste.io is a complete email server solution that includes SMTP, IMAP, POP3, antispam, and antivirus protection. It offers web administration and web email access, all deployable on your server in approximately five minutes.
Built with open-source components, Poste.io prioritizes security with native support for SPF, DKIM, DMARC, and SRS, plus SSL/TLS encryption everywhere. User data and configuration are stored separately, making backups and migrations simple. The system includes a spam filter (RSPAMD), antivirus (ClamAV), and a webmail client (Roundcube). Administrators can manage domains and users with different permission levels.
Features
- SPF, DKIM, DMARC, SRS: Native implementation with simple wizard for email authentication.
- Antivirus Engine: ClamAV integration to detect trojans, viruses, and malware.
- Built-in Spam Filter: RSPAMD for efficient spam detection.
- Webmail Client: Roundcube-based webmail over HTTPS.
- Email Redirection and Autoreply: Sieve script support for filtering, redirection, and autoreply.
- Quota Management: Limit mailbox space or email count.
- Web Administration: Role-based access for system admin, domain admin, and email owner.
- Autodiscovery: Built-in autodiscovery for Microsoft products and Thunderbird.
- SSL/TLS Everywhere: All data encrypted in transit; passwords stored as salted SHA512 hash.
- Docker Containerization: Isolated mail server container for security.
Use Cases
- Setting up a private email server for a business or organization.
- Hosting multiple domains with email services.
- Migrating from legacy email systems to a modern, secure platform.
- Providing webmail access for remote teams.
- Ensuring email deliverability with SPF, DKIM, and DMARC compliance.
FAQs
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How long does it take to deploy Poste.io?
Poste.io can be fully operational in about 5 minutes, mostly waiting for scripts to complete. -
What authentication methods does Poste.io support?
Poste.io uses salted SHA512 hashed passwords (5000 rounds) and supports SSL/TLS encryption for all communications. -
Can I host multiple domains on Poste.io?
Yes, Poste.io supports multiple domains with separate administration and user management. -
Is Poste.io compatible with Docker?
Yes, Poste.io is designed to run as a Docker container, isolated from other applications. -
What open-source components does Poste.io use?
Poste.io uses Roundcube for webmail, RSPAMD for spam filtering, ClamAV for antivirus, and Sieve for email filtering.
Helpful for people in the following professions
Poste.io Uptime Monitor
Average Uptime
100%
Average Response Time
482.5 ms
