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Quarantine A protected area for storing messages that contain viruses or are considered spam. Messages can be deleted from the quarantine or released back into an email inbox.

RBL Realtime Blackhole List. A list of servers that are considered sources of known spam.

RFC Request for Comments. A series of notes on Internet technologies. RFC’s can evolve to become actual Internet standards.

SMTP Simple Mail Transfer Protocol. An IETF standard protocol used for transferring mail across a network reliably and efficiently (as defined in RFC 821).

SMTP Pipelining Several SMTP commands are sent together in the same network packet.

Specific Access Pattern Defines an access pattern to match for on a specific part of an SMTP connection.

SSL Secure Sockets Layer. A protocol for encrypting and securing private data over the Internet.

STA Statistical Token Analysis. A method of identifying spam messages based on statistical analysis of email content.

Static route A routing entry ensuring connectivity to systems on other networks.

Subnet mask A subnet mask is used to divide the device part of the IP address into two further parts. The first part identifies the subnet number. The second part identifies the device on that subnet.

Syslog A syslog server collects and stores log files from many sources.

TCP/IP Transmission Control Protocol/Internet Protocol. This is the name for two of the most well-known protocols developed for the interconnection of networks. Originally a UNIX standard, TCP/IP is now supported on almost all platforms, and is the protocol of the Internet.

TCP relates to the content of the data travelling through a network — ensuring that the information sent arrives in one piece when it reaches its destination. IP relates to the address of the endstation to which data is being sent, as well as the address of the destination network.

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