IMAP4 in mailbox settings

The development of modern Internet poses a great challenge to traditional mail services. At present, it is believed that few paper-based letters are circulating with each other. We will all use emails. In this section, we will introduce the IMAP4 function. This function is embodied in many email systems. Many people recommend Kerio email servers created by Kerio technology companies. Many of them pointed out that Kerio is a fully functional email server software, and its price is ideal for small and medium-sized enterprises. However, the key to understanding the value of the Kerio mail server is to understand and use this software to support the IMAP4 Function and Its Web-based email program Webmail.

Most people are familiar with common SMTP/POP3 mail programs (such as Microsoft Outlook and Outlook Express ). These email programs can connect to the server and download each user's email to their own computer. Most of the mail servers we introduced earlier are POP3 mail server programs. Although the Kerio mail server can complete the POP3 service, it has the IMAP4 function. This function allows you to manage emails on the server without downloading them to your computer. The management of mail by IMAP4 is more centralized. Therefore, multiple services such as anti-virus and spam control can be concentrated on the server, rather than in the user program. Kerio Webmail is a Web-based email program with all common email functions and WAP functions connected to mobile phones.

Our tests on this software mainly focus on the Webmail and IMAP4 features, because these two features are not only distinctive from the Kerio mail server, but also unusual features, at least for the moment.

We found that the Kerio mail server is slower than the POP3 software in terms of mail management, especially when using dial-up connections. However, managing emails in this way has great benefits. With only one browser, you can receive emails sent from any computer with an Internet connection. There is no synchronization problem. Enterprises do not need to support too many complex email programs. You can set public mail folders for IMAP4 (this is a common feature in group server software ). This folder is easy to set and useful for sharing enterprise project information.

One reason organizations use their own email servers is the management level provided by the server software. The Kerio email server leverages this advantage to centralize security measures at the server level. Most of these individual security functions are common. However, the combination of these features will make the mail administrator feel that this software has powerful manageability.

Unlike most other email servers, the Kerio email server does not provide one but multiple anti-virus options. For example, the famous McAfee Anti-Virus Software protects inbound and outbound emails; f-Secure software is used for network mail, Sophos Anti-Virus interface, and Grisoft AVG 6.0 Server Edition. McAfee Anti-Virus Software is integrated into the mail server; the other three are plug-ins that can be easily added to the server. The Kerio mail server can filter emails and email content based on the file extension, although this function is not as advanced as other products such as VOP modusMail.

For general Email Security, The Kerio Mail Server completes this task in encrypted mode. OpenSSL provides POP3, SMTP, IMAP4, and Webmail encryption methods. In terms of anti-spam, administrators can select any map blacklist combination, such as RSS, RBL, and DUL, to prevent access to specific IP addresses. The user's identity can be identified by IP address, user name and password (verified by the NT domain name list), or through Kerberos 5 protocol. The quota can be set based on the number of mails per user, the number of mails per hour, or the number of mails that can be sent and received at the same time.

The installer is responsible for installing and setting the Kerio mail server. Because this is a standard installer, most of the installation processes can be completed smoothly. When many server components of the software are enabled, the Kerio mail server will use a large number of ports. To avoid conflicts, do not use Web services on this server. The Mail Service Monitor (Windows only) and Management Console are responsible for various management tasks, including remote access. These two programs are designed to be very practical, and have very good help files to provide support, it is easy to operate and set.

The Kerio Mail Server supports many settings: Dial-Up Network, lan, and leased line. We really like the advanced performance of this software that uses a dial-up network connection to regularly send and receive emails. The Kerio mail server can integrate multiple POP3 mail accounts and put the sent mails in a separate folder (A IMAP4 function ). To reliably download emails from other servers, this mail server software supports the ETRN (email processing) Activation Program.

Although the Kerio email server is not very good at routing, it supports access to mailbox aliases and groups.

For a mail server software that is not intended for large enterprises, the user management function of Kerio mail server is surprisingly powerful. For example, the user list can be directly ported to the software from the NT domain name user list, Microsoft activity directory, or using WinRoute Pro, instead of being manually entered like other software. In addition, the Kerio email server also has a template System for inputting standard information for multiple new users. All these features greatly simplify and speed up user management. This software also has many user-friendly features, such as multilingual support (English, Dutch, Czech, Slovak, and French ).

The server-centric approach adopted by IMAP4 and Web-based email access functions is suitable for many enterprise solutions, especially those that require high security and management as essential features. This method is the best solution for the Kerio mail server. However, the Kerio Mail Server is a fully functional SMTP/POP3 server that can run on multiple platforms at a very attractive price. The Kerio email server is very convincing for organizations to decide whether to manage their own emails.