configure sender callout exchange

Configure Sender Callout Exchange

An open proxy is a third-party computer that has been configured to serve spammers by untraceably relaying their mail, hosting, or guarding their websites, or performing other tasks.
Procmail is a popular component of unix-based smtp/pop/imap mail systems, and can be configured for spam filtering.
Open proxies (a third-party computer that has been configured to serve spammers by untraceably relaying their mail, hosting or guarding their websites, or performing other tasks, often known as "bots" or "zombies") are usually individual home or business pcs (typically running some version of microsoft windows) that have not been properly secured against malware attack, and that are connected to the internet full-time via some sort of broadband connection (so they're always available to the spammer).