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Mail Zimbra Architecture
Flow Architecture 

 

 

 Servers Support 

 Here are the servers needed for EMAIL to work 

 1. Web Mail 

 

 Provides browser-based email access for users who don’t use dedicated email clients. 

 

 2. IMAP/POP Server 

 

 Handles incoming email and allows users to retrieve messages. IMAP supports multi-device sync; POP3 is simpler and downloads emails locally. 

 

 3. MTA (Mail Transfer Agent)  server 

 

 Software like Postfix, Exim, or Sendmail that routes outbound and inbound emails between servers. 

 

 4. MDA (Mail Transfer Agent)  server 

 

 Delivers email into users’ mailboxes, often paired with MTA systems. 

 

 5. SMTP Relay server 

 

 An SMTP relay server securely forwards outgoing email messages from a sender's server to the recipient's email server across the internet. 

 

 6. Antivirus Server 

 

 An antivirus server scans, detects, and removes malware from network-connected devices and email traffic to protect enterprise systems from cyber threats. 

 

 7. Authentication Server (LDAP / Active Directory) 

 

 Manages user identity and permissions, often connected to internal directory services. 

 

 8. Email Archive/Retention Server 

 

 Stores emails securely for legal, compliance, and business continuity reasons. 

 

 9. Spam Filtering / Anti-Spam Gateway 

 

 Detects and blocks spam messages using blacklists, heuristics, or AI-based algorithms. 

 

 10. Encryption or Public Key Infrastructure (PKI) Server 

 

 Manages digital certificates and email encryption for secure end-to-end communication. 

 

 11. Monitoring & Logging Server 

 

 Tracks system health, email traffic, errors, and suspicious behavior for audits and diagnostics. 

 

 12. Backup & Disaster Recovery Server 

 

 Performs regular backups and ensures recoverability of email data in case of failure or attack.