Free microsoft exchange software for linux

Crypt::DH is a Diffie-Hellman key exchange system.

SYNOPSIS

use Crypt::DH;
my $dh = Crypt::DH->new;
$dh->g($g);
$dh->p($p);

## Generate public and private keys.
$dh->generate_keys;

$my_pub_key = $dh->pub_key;

## Send $my_pub_key to "other" party, and receive "other"
## public key in return.

## Now compute shared secret from "other" public key.
my $shared_secret = $dh->compute_secret( $other_pub_key );

Crypt::DH is a Perl implementation of the Diffie-Hellman key exchange system. Diffie-Hellman is an algorithm by which two parties can agree on a shared secret key, known only to them. The secret is negotiated over an insecure network without the two parties ever passing the actual shared secret, or their private keys, between them.

Enterprise File Exchange (EFX) slots in where email file attachment limits stop your users from sending those important files to a contact.

In the EFX world, the user visits the EFX site, uploads the file, enters the receivers email address and lets the system notify the receiver that theres a file waiting for them, via a simple email message.

Senders need to sign up, and the EFX system only allows transfers between internal users (those with addresses in an approved list) and external users, never external to external.

It is written in Python, using the Pylons framework.

This project is licensed under the GNU GPL version 3.

MailArchiva is a powerful email archiving solution. MailArchiva project is all you need to ensure that your organizations emails are backed up permanently. It automatically retrieves emails from Microsoft Exchange and stores them on multiple hard disks.
MailArchiva stores all incoming, outgoing, and internal emails for long-term storage. In doing so, it enables your company to retain valuable knowledge and comply with US and EU legislation such as the Sarbanes Oxley Act.
MailArchiva ensures that the integrity of your information remains intact. Emails are stored directly on the filesystem, as opposed to a database. As a result, there are no hidden database maintenance costs and the integrity of archived information is not subject to database corruption.
MailArchiva is a turnkey product that is easy to install and use. A clean install usually takes approximately 30 minutes.
MailArchiva is a commercially supported open source product. You have the assurance of commercial grade support combined with open source benefits.
Enhancements:
- This release introduces several major enhancements and bugfixes.
- For instance, MailArchiva is now fully internationalized, supporting indexing, search, and retrieval of emails in multiple languages.
- The archiving server has been completely rearchitected to utilize Java 1.6 contructs.
- The Microsoft Exchange archiving agent has been redesigned from the ground up.

Distributed Checksum Clearinghouse, in short DCC, is a system of clients and servers that collect and count checksums related to mail messages. The counts can be used by SMTP servers and mail user agents to detect and reject bulk mail.
DCC servers can exchange common checksums. The checksums include values that are "fuzzy", or constant across common variations in bulk messages.
Enhancements:
- This release improves the dccifd per-user whitelist default.
- It fixes the server database size estimate.
- Old installations really should upgrade to get the MIME decoding fix.

Openchange project intends to provide an Open-Source implementation of Microsoft Exchange Server 2003 under Unix Platforms.
The Openchange Project is developed in C language under the BSD license, and will primary work on NetBSD, OpenBSD, FreeBSD and Linux platforms. The project time line has been defined to approximatively one year, and we believe the project will be in a complete stable state at this time.
Openchange wishes to integrate the enterprise working environment and to substitute to an Exchange Server in a transparent way, so final users may continue to use Outlook, or any other mail client.
We also intend to provide to network administrators an easy solution to migrate Exchange databases into Openchange ones and reversely. And last but not least, we work so developers may reuse our sources in a smart way.
The project is divided into 4 parts :
- The OpenChange Library
- The OpenReverse Library
- The Documentation Framework
- The Openchange specifications
The OpenChange Library
This library includes all the requests managing the identification process, the data flow, and all the other requirements needed to permit the communication between an Outlook client and an Exchange Server. It can be used either to develop another Exchange-like server or client.
The OpenReverse Library
Due to legal restriction, the Openchange Server wont reuse the Microsoft Jet Database file format. Instead, we provide a library making easy to parse headers, retrieve the data, calculate checksum and more generally to offer a abstract migration tool to other user defined backends. This library can also be used for basics to develop a repair database tool.
The Documentation Framework
In the documentation framework, you will find all our research results. The subjects may concern the Exchange Internals or treat of a related subject. We wants to provide the most valuable information so our work can be shared with developers community.
The OpenChange Specifications
At last, we will provide the complete specifications of OpenChange in a printable way. This major document of the OpenChange team will help new developers to understand how Exchange Server works, how we implemented our APIs to make OpenChange, Exchange compatible. Around this main development, you will find several modules:
- OpenUtils Library
- OpenSniff
- OpenEDB
Enhancements:
- This release fixes limitations from the previous release (0.2) and adds a set of new features.
- Sending email messages to external recipients is now possible.
- It can also fetch and create appointments, contacts, and tasks in their respective default folder.
- Experimental NEWMAIL notification support is also available.
- The openchangeclient command line messaging tool has been improved and exchange2mbox has been introduced.
- It provides a way to synchronize an Exchange mailbox with an mbox file, supports MIME types, and is able to reflect changes back to Exchange.

Laffer is a Web-based instant messenger client.
Laffer is written in HTML and JavaScript, and it uses DOM 1.2 and PHP. Laffer is capable of exchanging text messages, contact list visualization, presence status visualization, and getting information about the user.
No file, audio, or video exchange is supported at the moment.
Enhancements:
- Fixed an issue that prevented the Im Proxy Server to work at all.