Crypt::OpenSSL::Random provides the ability to seed and query the OpenSSL
library's pseudo-random number generator

Crypt::OpenSSL::RSA is an XS perl module designed to provide basic RSA
functionality. It does this by providing a glue to the RSA functions
in the OpenSSL library.

Mail-DKIM is a Perl module that implements the new Domain Keys
Identified Mail (DKIM) standard, and the older Yahoo! DomainKeys
standard, both of which sign and verify emails using digital signatures
and DNS records. Mail-DKIM can be used by any Perl program that wants
to provide support for DKIM and/or DomainKeys.

Postfix aims to be an alternative to the widely-used sendmail program.

Vipul's Razor is a distributed, collaborative, spam detection and
filtering network. Razor establishes a distributed and constantly
updating catalogue of spam in propagation. This catalogue is used by
clients to filter out known spam. On receiving a spam, a Razor
Reporting Agent (run by an end-user or a troll box) calculates and
submits a 20-character unique identification of the spam (a SHA Digest)
to its closest Razor Catalogue Server. The Catalogue Server echos this
signature to other trusted servers after storing it in its database.
Prior to manual processing or transport-level reception, Razor
Filtering Agents (end-users and MTAs) check their incoming mail against
a Catalogue Server and filter out or deny transport in case of a
signature match. Catalogued spam, once identified and reported by a
Reporting Agent, can be blocked out by the rest of the Filtering Agents
on the network.

Can be used as one of the spamassassin rules.

spamassassin adds a header line that shows if the mail has been
determined spam or not. This way, you can decide what to do with the
mail within the scope of your own filtering rules in your MUA (Mail
User Agent, your mail program) or your LDA (Local Delivery Agent).

See the files in the documentation directory
/usr/share/doc/packages/spamassassin/ for more information on how to
use the filter.

This makes possible to create and manage autofs entries in an LDAP
server. The autofs entries will be created according the nis.schema
using the objectclasses nisMap and nisObject. The entries are placed
under ou=AUTOFS,$LDAPBASE.

The YaST2 component for mail configuration. It handles Postfix, Cyrus,
Amavis and Fetchmail.

Amavisd-new is a high-performance interface between mailer (MTA) and
content checkers: virus scanners or SpamAssassin. It talks to the MTA
via (E)SMTP, LMTP. It works with the
following MTAs:

- postfix

- sendmail (sendmail-milter)

- exim

Two utilities, written by Edwin Groothuis, to test and debug DHCP:

dhcpdump This parses tcpdump output to display the dhcp-packets for
easier checking and debugging.

dhcping This allows the system administrator to check if a remote DHCP
server is still functioning.

Home page: http://www.mavetju.org

dhcpcd gets an IP address and other information from a corresponding
DHCP server, configures the network interface automatically, and tries
to renew the lease time depending on the command line option.

DKIMproxy is an SMTP-proxy that signs and/or verifies emails, using the
Mail::DKIM module. It is designed for Postfix, but should work with any
mail server. It comprises two separate proxies, an "outbound" proxy for
signing outgoing email, and an "inbound" proxy for verifying signatures
of incoming email. With Postfix, the proxies can operate as either
Before-Queue or After-Queue content filters.

The Network Time Protocol (NTP) is used to synchronize the time of a
computer client or server to another server or reference time source,
such as a radio, satellite receiver, or modem.

Ntpd is an operating system daemon that sets and maintains the system
time-of-day synchronized with Internet standard time servers.

Crypt::OpenSSL::Bignum provides access to OpenSSL multiprecision integer
arithmetic libraries. Presently, many though not all of the arithmetic
operations that OpenSSL provides are exposed to perl. In addition, this
module can be used to provide access to bignum values produced by other
OpenSSL modules, such as key parameters from Crypt::OpenSSL::RSA.

Crypt::OpenSSL::Random provides the ability to seed and query the OpenSSL
library's pseudo-random number generator

Crypt::OpenSSL::RSA is an XS perl module designed to provide basic RSA
functionality. It does this by providing a glue to the RSA functions
in the OpenSSL library.

This module implements the various components of the DKIM and DomainKeys
message-signing and verifying standards for Internet mail. It currently
tries to implement these specifications:

* RFC4871, for DKIM

* RFC4870, for DomainKeys

The module uses an object-oriented interface. You use one of two different
classes, depending on whether you are signing or verifying a message. To
sign, use the the Mail::DKIM::Signer manpage class. To verify, use the the
Mail::DKIM::Verifier manpage class. Simple, eh?

Postfix aims to be an alternative to the widely-used sendmail program.

Vipul's Razor is a distributed, collaborative, spam detection and
filtering network. Razor establishes a distributed and constantly
updating catalogue of spam in propagation. This catalogue is used by
clients to filter out known spam. On receiving a spam, a Razor
Reporting Agent (run by an end-user or a troll box) calculates and
submits a 20-character unique identification of the spam (a SHA Digest)
to its closest Razor Catalogue Server. The Catalogue Server echos this
signature to other trusted servers after storing it in its database.
Prior to manual processing or transport-level reception, Razor
Filtering Agents (end-users and MTAs) check their incoming mail against
a Catalogue Server and filter out or deny transport in case of a
signature match. Catalogued spam, once identified and reported by a
Reporting Agent, can be blocked out by the rest of the Filtering Agents
on the network.

Can be used as one of the spamassassin rules.

spamassassin adds a header line that shows if the mail has been
determined spam or not. This way, you can decide what to do with the
mail within the scope of your own filtering rules in your MUA (Mail
User Agent, your mail program) or your LDA (Local Delivery Agent).

See the files in the documentation directory
/usr/share/doc/packages/spamassassin/ for more information on how to
use the filter.

This makes possible to create and manage autofs entries in an LDAP
server. The autofs entries will be created according the nis.schema
using the objectclasses nisMap and nisObject. The entries are placed
under ou=AUTOFS,$LDAPBASE.

The YaST2 component for mail configuration. It handles Postfix, Cyrus,
Amavis and Fetchmail.

Amavisd-new is a high-performance interface between mailer (MTA) and
content checkers: virus scanners or SpamAssassin. It talks to the MTA
via (E)SMTP, LMTP. It works with the
following MTAs:

- postfix

- sendmail (sendmail-milter)

- exim

Cyrus is a highly scalable enterprise mail system designed for use in
enterprise environments of various sizes using standards based
technologies. Cyrus technologies scale from independent use in email
departments to a system centrally managed in a large enterprise.

Two utilities, written by Edwin Groothuis, to test and debug DHCP:

dhcpdump This parses tcpdump output to display the dhcp-packets for
easier checking and debugging.

dhcping This allows the system administrator to check if a remote DHCP
server is still functioning.

Home page: http://www.mavetju.org