smtp test

HS SMTP Protocol C Source Library, supports SMTP over TLS

1st SMTP Server - free SMTP relay server.

Disclaimer, S/MIME for IIS SMTP Service and Exchange Server.

DomainKeys/DKIM for IIS SMTP Service and Exchange Server.

High-performance outgoing SMTP mail server program for large organizations.

Disclaimer, S/MIME for IIS SMTP Service and Exchange Server.

Durable and secure SMTP/POP3 server. Lots of features against spam DDoS

Simple, Powerful, and Accurate email spam firewall for Exchange/SMTP Servers.

A SMTP gateway between your mail server and the Internet, catching spam/viruses.

Disclaimer, S/MIME for IIS SMTP Service and Exchange Server.