(STEVEN)   
http://www.softwaredevelopment.net.au

(STEVEN) employs an advance email checking system that validates the sender of the email rather than relying on content to determine if it is spam or not. (STEVEN) does this by automatically replying to all emails it retrieves with a brief message asking the sender to validate the message they sent you. The sender validates it simply by hitting reply and send. This is a once only procedure per sender as once they have been validated it will never need to validate them again. People that send spam very rarely have a valid email address and hence (STEVEN) detects this and determines the email as SPAM. For mailing list you have subscribed to you will have to manually white list these senders once. (STEVEN) will also delete attachments automatically that can be considered harmful to your system. This is an optional setting and you can control which attachments to delete or warn the user about.

Antispam Scanner   
http://www.styopkin.com

Let's face it - spam is a 14 billion dollar a year problem that is not going away any time soon. Modern anti-spam solution do very little to help businesses and individuals with this problem. The most advanced applications that use heuristics and boast a 99% spam exclusion rate don't mention that up to 13% of valid correspondence is lost in the process. In addition, all "professional" spammers have research departments that make sure their messages pass most filters and fool popular spam fighting solutions, before they start their campaigns. There is only one solution that they can't trick - Antispam Scanner. Why? Antispam Scanner is not a spam filter! Rather, it's a proactive antispam agent that launches pre-emptive strikes. It does not matter what e-mail client you use. After the program is set up, Antispam Scanner connects to your mailbox and purges it free from spam right on the server. This way you don't have to download messages first. After the program "kills" all obvious spam and viruses, it processes the rest of the messages. First, it searches for the messages that meet the white list criteria. These are not just the ones from the people you know. White list triggers may be certain keywords, like the names of products that are being sold in your web shop (Golf ball, HTML-2-RTF Pro, Presario, etc) or a typical subject line (Re: pet adoption, for example). These are delivered to your mailbox. The rest of the messages will be parked in the "yellow zone". These are suspicious e-mails that may nevertheless be valid, like e-coupons or newsletters. In most instances, you can simply look at the address and the subject line to see if it's spam or not. Since the message (and attachments) parked in the "yellow zone" are not downloaded without your consent, you don't risk getting infected with a virus or spyware. This solution is especially helpful for web businesses and organizations, because it's the only way to stop spam, without any risks!

POP3 OCX   
http://www.vb4all.net

The POP3 OCX component is an advanced Active-X control which can be embedded into any Active-X compatible environment, and used to check pop3 servers for email. With the control you can enumerate the properties of received emails for validation or data retrieval. The component has a full series of properties and methods that can be used to interact with email.

Email caster   
http://www.worldminer.com

Email caster is a marketing tool software that can validate emails list and send customized message  directly to recipients and get instant feedback.It has embeded in SMTP relay ,so you do not need using the SMTP relay server of your ISP.In addition,Email caster can give you instant feedback on every email sent ,then you can delete those invalid email addresses from your mailing lists.

Emailserver detector   
http://www.worldminer.com

Emailserver detector is a software designed to directly search email addresses from mail servers. It can verify all user names that you specified on the mail server.The program tries to connect with a specail Smtp-server and simulates sending the message. It does not come to the message sending ,in fact,It disconnect as soon as mail server informs does this address exist or not.The program is multi-threaded that provides the high speed of verifying. Using this software, you can get lots of email addresses from a special email server,For example :Hotmail.com .It can also send message to valid email addresses while searching.It has Embeded in a SMTP server that quickly send mass email directly to recipients.No use your ISP'S SMTP server.You can also save the valid email addresses to a one-per line text file.