With the problems of SPAM, most ISPs now block SMTP relay, that is, the ability to send email from anywhere back through your server to wherever you want. SMTP Spotter solves that by finding a local valid SMTP server that will allow you to send mail

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Free SMTP Server is a local SMTP server program for Windows

Fast and secure SMTP/POP3 server. Compatible with any mail client. Lots of security and anti spam features. Multiple SMTP gateways for messages that cannot be delivered directly. Parameterized mailing lists.

SMTP Server Pro is a powerful SMTP POP3 mail server program designed for satisfying the requirements of huge organization in high-volume messaging. it has security features to prevent DDoS attacks and block SPAM. Ideal for laptop PC users.

A free SMTP relay server. Allows to relay emails sent to it, directly to their destination, bypassing your provider's mail server. If you need to send large quantities of email, set up a few of these servers on different computers and let a massmail

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Bullet-proof SMTP POP3 server software used by corporations and Internet Service Providers as an ultra fast and reliable mail server. Its security features and options let you prevent DDoS attacks and block SPAM. It is also ideal for laptop PC users