Socket Secure or SOCKS is a protocol that routes network packets between clients and servers via a proxy server. SOCKS 5 provides additional authentication so that access is restricted to authorized users only. In pragmatic terms, TCP connections are subject to proxy by SOCKS server to an IP address that is arbitrary, providing a route for forwarding UDP packets.

SOCKS proxy or SMTP proxy IP addresses are mainly used for emailing. OSI model Layer 5 is the performance standard for SOCKS Proxy. OSI layer 5 is the session layer, which presently acts as an intermediary between the presentation and the transport layers.

Uses of SOCKS Proxy

The most common use of SOCKS is a circumvention tool for bypassing web filters. SOCKS proxy allows access to resources blocked by institutions like schools, workplaces, and government offices. There are some SSH suites that support dynamic port forwarding, giving users the opportunity to create a SOCKS proxy. Essentially, the user is freed of the limitations that come from connecting to a predefined server or port.

Comparing SOCKS Proxy to HTTP Proxy

The operational efficiency of a SOCKS proxy is lower than a HTTP proxy. In most cases, a handshake protocol is employed by SOCKS to inform the proxy software about any attempts to connect to it, often made by a client. SOCKS proxy is a transparent proxy and does not rewrite or interpret headers. In addition, SOCKS proxies are capable of forwarding and receiving UDC packers.

Understanding SMTP Proxy

SMTP proxies are essentially MTAs (Mail Transfer Agents) which are similar to other types of proxies that pass sessions without employing the standard store-and-forward model of typical MTAs. When a connection is received by an SMTP Proxy, another session of SMTP is initiated towards the target SMTP. If the target MTA displays an error message, the proxy passes the message back to the MTA that is sending the request. The most recurrent usage of SMTP proxies is filtering and processing email traffic.

Advantages of SMTP Proxies

Like most Mail Transfer Agents, SMTP proxies do not store messages. This enables the proxy to pass content in real time or reject SMTP links. This does away with the need to employ Non Delivery Reports (NDRs), which cause backscatter email, one of the most vehement problems associated with E-mail.

TCP Connection management is also initiated and implemented by certain SMTP proxies, aiding in downstream mail server damage reduction that arise from malicious SMTP spikes. The connection management (TCP) comprises bandwidth throttling and delaying command responses in SMTP. Oftentimes, malicious SMTP traffic sources (like spam bots) show a tendency to quit over delivering an email message in full.

For safety reasons, Proxy Key does not provide SMTP proxies to our clients.