Email protocols

The IMAP and POP3 protocols are the most widespread protocols used to receive email communication in an email client application. The Internet Message Access Protocol (IMAP) is another Internet protocol for email retrieval. IMAP has some advantages over POP3, for example, multiple clients can simultaneously connect to the same mailbox and maintain message state information such as whether or not the message has been read, replied to or deleted. ESET Internet Security provides protection for these protocols regardless of the email client used, and without requiring re-configuration of the email client.

The protection module providing this control is automatically initiated at system startup and is then active in memory. IMAP protocol control is performed automatically without the need to reconfigure the email client. By default, all communication on port 143 is scanned, but other communication ports can be added if necessary. Multiple port numbers must be delimited by a comma.

You can configure IMAP/IMAPS and POP3/POP3S protocol checking in Advanced setup. To access this setting, expand Web and email > Email client protection > Email protocols.

Enable email protection by protocol filtering – Enables checking of email protocols.

In Windows Vista and later, IMAP and POP3 protocols are automatically detected and scanned on all ports. In Windows XP, only the configured Ports used by the IMAP/POP3 protocol are scanned for all applications, and all ports are scanned for applications marked as Web and email clients.

ESET Internet Security also supports the scanning of IMAPS and POP3S protocols, which use an encrypted channel to transfer information between server and client. ESET Internet Security checks communication utilizing the SSL (Secure Socket Layer), and TLS (Transport Layer Security) protocols. The program will only scan traffic on ports defined in Ports used by IMAPS/POP3S protocol, regardless of operating system version.

Encrypted communication will be not scanned. To enable the scanning of encrypted communication and view the scanner setup, navigate to SSL/TLS in Advanced setup section, click Web and email > SSL/TLS and enable the Enable SSL/TLS protocol filtering option.