SMTP proxies are specialized mail servers that, similar to other types of proxy servers, pass simple mail transfer protocol (SMTP) sessions through to...

Distributed Checksum Clearinghouse FreeProxy Internet privacy InterPlanetary File System Proxy list Proxy pattern SMTP proxy Virtual private network Web accelerator...

The Anti-Spam SMTP Proxy (ASSP) is an open-source, Perl based, platform-independent transparent SMTP proxy server. Some ASSP's features are: Hidden Markov...

enable them, leaving the receiving SMTP server no effective way to validate the sender's email address. SMTP proxies allow combating spam in real time...

implemented for SMTP tarpits, systems that plug into the Mail Transfer Agent (MTA, i.e. the mail server software) or sit in front of it as a proxy.[citation...

Zimbra Apache James Cyrus IMAP server Stalwart Mail server Anti-Spam SMTP Proxy Axigen Bogofilter Clearswift Secure Email Gateway DSPAM fdm Gordano Messaging...

URL rewriting and redirection TLS/SSL support STARTTLS support SMTP, POP3, and IMAP proxy Requires authentication using an external HTTP server or by an...

through a mailing list or a forwarding service. B can be an outbound SMTP proxy or a smarthost. If the local network does not block outbound port 25 connections...

through a proxy server. SOCKS5 optionally provides authentication so only authorized users may access a server. Practically, a SOCKS server proxies TCP connections...

filters. The company's first product was an SMTP proxy that provides tar-pitting and transparent SMTP proxy functionality for inbound email filtering....

SMTP Authentication, often abbreviated SMTP AUTH, is an extension of the Simple Mail Transfer Protocol (SMTP) whereby a client may log in using any authentication...

qpsmtpd is an SMTP daemon written in Perl. It was originally designed to be a drop-in replacement for qmail-smtpd, the SMTP component of qmail, and it...

pages List of FTP server return codes List of HTTP header fields List of SMTP server return codes Common Log Format Emphasised words and phrases such as...

Services roughly divide into Proxy related services and Internet Server related services. Proxy services include HTTP, SMTP, POP3, SOCKS, FTP and a generalized...

and forward to a qmail based message store. SMTP Authentication via LDAP, vpopmaild, flat_file, or SMTP proxy. Access control by domain, IP, sender, or...

service providers is transparent SMTP proxying, in which email traffic is intercepted and filtered via a transparent proxy within the network. Outbound filtering...

Apple's Bonjour Sleep Proxy service is an open source component of zero-configuration networking, designed to assist in reducing power consumption of...

Varnish is focused exclusively on HTTP, unlike other proxy servers that often support FTP, SMTP, and other network protocols. The project was initiated...

use of the victim machine, which serves as a proxy for the request, similar to an Open mail relay using SMTP. This technique can be used to port scan hosts...

forward mail can avoid generating backscatter by using a transparent SMTP proxy. Mail servers sending email bounce messages can use a range of measures...

Hypertext Transfer Protocol (HTTP) and the Simple Mail Transfer Protocol (SMTP). A call established with SIP may consist of multiple media streams, but...

similar to greylisting. Originally, the authors conceived an MT Proxy to rate-limit the SMTP connections of messages believed to be spam. That worked by adding...

ports. TCP port 465 was originally assigned to allow the use of SMTP over SSL (SMTPS), but practical concerns meant that it was left unused and according...

cookies, HTTP POST, HTTP PUT, HTTP proxy tunneling, HTTPS, IMAP, Kerberos, LDAP, MQTT, POP3, RTSP, RTMP, SCP, SMTP, and SMB. The library supports the...

over SMTP Verified with https://starttls-everywhere.org/ or other SPF is configured and outbound mail passes SPF test from default webmail and SMTP Outbound...

services implement HTTP bindings, in theory other bindings such as JMS or SMTP could be used; in this case end-to-end security would be required. Even if...

A virtual private network (VPN) service is a proxy server marketed to help users bypass Internet censorship such as geo-blocking and users who want to...

classical after-queue mail filtering setup, or amavisd can be used as an SMTP proxy filter in a before-queue filtering setup, or the amavisd process can be...

so it is not limited to HTTP. Internet privacy List of proxy software X-Originating-IP for SMTP equivalent List of HTTP header fields "Overview of parsed...

Stopper (RSS), spam relays, e.g. hijacked servers. Open Proxy Servers (OPS), naively open SMTP servers. Non-confirming Mailing List (NML), marketers who...