smtp. trial software / shareware for linux

milter-spamblocker is a lightweight, reliable and very fast Sendmail milter designed to reject SPAM and Internet worms going from trojaned/infected Windows computers (zombie hosts) around the world.
It blocks up to 99% of SPAM and up to 99.9% of Internet worms. You will not need to pay for the garbage traffic now. Its written in C.
Main features:
- external editable configuration file;
- whitelist by an IP address (in CIDR notation);
- whitelist by a PTR (reverse DNS) record;
- whitelist by an envelope sender email address;
- whitelist by an envelope recipient email address;
- SMTP AUTH support;
- adaptive anti zombie technology;
- real-time sender address verification with an autowhitelist;
- strictly RFC-2821 compliant MX callback engine;
- tolerance against non RFC-2821 compliant email servers;
- blocking of email messages with a spoofed senders email address;
- real-time recipient address verification with authoritative email stores;
- progressive slowdown of recipients email address brute force attacks;
- Sendmail virtusertable and mailertable features full support;
- safe anti bounce / backscatter technology;
- legitimate email messages friendly GreyListing with an autowhitelist;
- blocking of harmful attachments to prevent viruses from spreading;
- persistent cache engine;
- low level of false positives.

COMDOM Antispam is a high-capacity platform designed for the requirements of ISPs and other large organizations that must fight spam. This project is a powerful anti-spam system operating as a stand alone mail gateway with relay control, authentication, and load balancing support. The system consequently can be used together with mail servers or as a stand alone gateway for several mail servers. The robustness, flexibility, and the high data throughput
Enhancements:
- This release fixes searching in static lookup tables (atree) and arguments of SMTP protocol command checking, merges configuration files into a single file, adds a utility for merging old configuration files into one, changes some default configuration values, and fixes minor problems in relaying and logging.
Version restrictions:
- 30 day trial

Mailonator is server-side software that makes it easy to send large attachments to anyone using your regular email client.
With easy download and install in minutes, Mailonator ensures your attachments always arrive now and in the future.
Mailonator software installs easily and quickly behind the scenes, so your email service and client tools never need to change. Your mail arrives regardless of which email client or service your recipients use, even if they are subject to Inbox quotas, attachment removal or other restrictions.
Mailonators Attachment Confirmation feature means you can quickly confirm that recipients requested your attachment. In addition, Mailonators usage statistics provide your system administrator with important information about Mailonators performance and the efficiency gains achieved by using Mailonator.
Main features:
- Mailonator is a powerful, fully scalable and highly secure solution to solving the problem of sending large contents using regular email tools.
Replaces Bulky Attachments With Web Links
- When you send email from a Mailonator-enabled email account, Mailonator automatically removes each attachment from your emails and replaces every attachment with a unique link. Your recipients can download the attachments with just a click.
Publishes Attachments Securely on a Web Server
- Mailonator stores attachments securely on a web server, in such a way that it becomes impossible to guess the attachment URL. Attachments are deleted automatically after a pre-set amount of time that you can configure.
Transparent to Users? No Additional Client Side Software Required
- Mailonator is server-side software, so you dont need to install any software on the sender or recipient sides.
Optional discreet Download Notifications
- Optionally, you can choose to receive a discreet Download Notification that is sent when your email recipient clicks the link to download the attachment you sent.
Automatic Storage Management
- With Mailonator, theres no hassle managing disk space. You can easily configure the software to remove attachments from the Web server after a specified time.
Usage Statistics
- Mailonators reporting tools make it easy to track statistics about attachment volumes, email peak flows and other useful information.
Multiple Configuration Options
- Mailonator comes in several configurations that easily adapt to your in-house or out-sourced email configuration, including as a gateway to your SMTP server or as a plug-in option for your existing mail server.
Version restrictions:
- Your trial license is restricted to 5 email sender addresses and expires in 14 days.
Enhancements:
- This release creates a backup of the statistics file under the name statistics.xml.bak.
- This also applies to group statistics files.

SocketMail Professional Edition is a professional e-mail server that enable you to do multi-domain hosting. From a single point of installation in a particular server, you can run virtually unlimited e-mail (and webmail) service. This is particularly useful if you are an e-mail service provider. SocketMail Pro require you to have a dedicated server and root access to install and configure.

We strongly suggest that you read through the whole page to get full understanding of SocketMail Pro components.

General Concept

SocketMail Pro is for serious e-mail service provider and therefore the main control of the whole system is called a Provider. The Provider manages domains on the server. Each domains are administrate by Webmaster.

Per server, there is only one (1) Provider and the Provider function is to provide service to all hosts/domains which the provider hosted. Each host then serve public or users. From this relationship, its clear that each node or members of the relationship have it own task and function. Therefore, provider will have Provider Console (via web browser) to administrate service for hosts/domains.

Host/Domain will have Webmaster Console (via web browser) to manage rights and functionality provided by provider plus to serve it users. End-user will have the web client interface to manage it mails and to utilize services and products provided by the provider via the host.

Components

The incoming mails are handled by integrating SocketMail with your servers MTA (see MTA Integration section below). The integration with your server existing MTA (such as Exim/Qmail/Sendmail/Postfix) to enable SocketMail to process incoming mails and deliver them to user mailboxes.

As of version 2.2.8, SocketMail Pro comes with POP3/SMTP daemon as well as implementation via xinetd/inetd service. You may offer accounts to send and receive emails via their favourite email client such as Outlook. If you are using the daemon, the POP3/SMTP server can be turned on/off from the admin page (unless your php is on safe-mode, then you need to do it manually). Simple and easy to run. However, you have alternative to implement the POP3/SMTP server via your servers xinetd/inetd service. Therefore there are two (2) ways of implementing the POP3/SMTP service, either using the daemon or via xinetd/inetd service. Using the xinetd/inetd service may have more advantage as you may define more parameters as provided by xinetd/inetd service, they dont need to be restarted when your machine restarted and the service is a bit faster too.

MTA Integration

SocketMail can be integrated with your existing MTA on your server such as Exim, Qmail, Postfix or Sendmail. The integration involves manual process of modifying the MTA configuration file. This require certain level of knowledge in managing your server system.

With MTA integration process, you may define selected domains to be receive and process by SocketMail engine whilst the rest of the domains on your server still continue to have their mails managed and process by the existing MTA.

POP3 Server

SocketMail POP3 server is implemented using your server Inetd or Xinetd service (a TCP wrapper).

You may want to define SocketMail POP3 server to listen to other port number so that it will not conflict with the standard port 110. Because of the nature of retrieval POP3 is based on user action, you can tell your user to configure their e-mail client to retrieve mails using the port number you defined rather than the standard port.

Using E-mail Client

Using SocketMail Pro, each domain (and it users) can be configured and defined if they can send and receive e-mails using their favourite e-mail clients such as Outlook, Eudora and TheBat. This definition need to be defined by the Provider (refer to General Concept section) to the particular domain. The sending of e-mail from an e-mail client is done by connecting to an Outgoing/Outbound SMTP server. The mail retrieves by an e-mail client is normally done via POP3 server. Therefore to enable this service, Not only the configuration in the Administrator Control Panel (Admin CP) of SocketMail need to be proper, the Outgoing SMTP and the POP3 server should be up and running on your server.

The POP3 service been touched in the section above and the Outgoing SMTP will be touch in the next section.

Outgoing SMTP

You need to set-up the SocketMails Outgoing SMTP using xinetd service in your server. Again, the port should be a different port number than port 25. Because of the nature of sending e-mail from e-mail client is based on user action, you can tell your user to configure their e-mail client to define the outgoing mail server and port number you defined rather than the standard port.

PortSensor project is a server monitoring tool. Sensors can be created to monitor nearly any TCP/UDP service, such as: HTTP, FTP, POP3, SMTP, MySQL and DNS.
Custom sensors can be created to monitor your other critical server metrics, such as: processor loads, mail queue loads, disk space usage and log activity.
Enhancements:
- This version adds operators (lt, gt, etc.) to simply the creation of Custom Notification Rules, notification and status UI improvements, improved notification email messages, and the opening up of PortSensor for unlimited servers and sensors even without a license.

Ponton X/P is an ebXML/AS1/AS2 Message Service.
Ponton X/P is currently in use at over 80 companies in Europe and North America. All the productive participants in papiNet, the trade network of the paper industry, use Ponton X/P.
Main features:
- In productive use under Windows (from NT to XP), AIX, Solaris, Linux, HP/UX
- Supports ebXML 2.0, the vendor independent messaging standard
- Encryption of documents
- Validation of documents against XML Schemas
- Guaranteed delivery of documents, or a detailed error log
- Electronic signing based on the PKCS and XML Signature standards
- Compression of documents to less than 10% of their original size
- Archiving of documents, signatures, certificates, etc.
- Comprehensive logging and notification services
- Synchronous or asynchronous data transmission via HTTP, HTTPS, SMTP or S/MIME
- Simple installation of electronic keys and certificates
- Use of the Ponton CA or other certification authorities for Ponton X/P
- Configuration and monitoring via Web interface
- Support for SOAP
- Extension of the processing pipeline by means of supplementary modules
- Partner specific configuration of all processing options
Enhancements:
- Several configuration options were added.
- Some issues were resolved.
- Some interoperability enhancements were made.