Easy installation and useful mail system
Just few steps of installation, a useful mail server with POP3, SMTP, WebMail and WebDisk function can be deployed and ready for use.

Anti-Virus
Built-in with Clam AV scan engine can filter malicious program in mail content, to prevent mail receiver from virus threat. The virus pattern can be updated regularly, and without any license fee.

Mail server transfer
It is very possible to lost mail during the period of a new mail server installation. ES-4000 provides a mechanism to check new mail from old mail server even in the process of DNS synchronized, and keep on receiving the mail.

Mail account transfer
ES-4000 provides a feature to transfer mail account from old mail server just in few configured steps. With learning systems, the administrator will not need to re-create all the account one by one.

DNS
Built-in with DNS server, administrator can setup the domain name resolution by himself, and will not need to spend money to deposit DNS service at ISP.

Web Mail
Sometimes users need to access email in public computer, such as cyber café, and it is not allowed or not properly to download private mail. Web mail function works to provide internet user to check mail via web browser, so users will be able to read or send email in anywhere.

Personal Web Disk
Instead of sending mail with attaching large file, user can store the file in Personal web disk and send out the address of hyperlink, and then Internet user will be able to download it without authentication.

Shared Address Book
ES-4000 provides Shared Address Book for WebMail users; it can also connect to mail client software with LDAP service, such as Outlook Express, to search the destination address within Shared Address Book.

Remote Backup
ES-4000 will record every passing mail as the record, and user can select the schedule to backup the record to NAS or File Server. Those mail records also can be retrieved from NAS or File Server via ES-4000.

Customize mail account
Each mail account can be customized based on company’s policy, the contents include Mail size limitation, Mail box Quota, and Personal web disk quota.

HA
Built-in with HA (High Availability) function, the stored data can be synchronized with two ES-4000 devices, to prevent losing mail in case a mail server crashes.

Embedded with 160G Hard Disk
ES-4000 embedded with 160GB IDE hard disk to store the mail, and users can replace the hard disk by themselves, it supports to format the hard disk as its original capacity. The maximum size is up to 350GB.