Search Results for "tcp/ip"

... for a message. Rspamd can act as a Milter allowing direct interaction with popular MTA systems, such as Postfix or Sendmail. Rspamd is designed to process hundreds of messages per second simultaneously, and provides a number of useful features including a comprehensive Lua API that allows access to messages processing in various aspects as well as asynchronous network API to access external resources, such as DNS, HTTP or even generic TCP/UDP services.

SMWrapper receives e-mails as standard sendmail program, filters them for X-PHP-Script in the Header and manages limits and informs the user and administrator when a limit is reached. After processing, the real sendmail program gets invoked.

Amber - a "grey list" for Qmail. Amber sits in the tcpserver chain, not accepting or rejecting mail but deferring connections from new IP addresses for some time (default five minutes) before it starts accepting mail from them.

With DynaStop, an Exim administrator or procmail admin/user can filter incoming mail on the basis of whether it is a dynamic IP address, thus reducing system load and resources in processing unwanted mail.

nPostACL is an simple open source network daemon intended to act as a Postfix tcp-lookup table, which provide per-host connect rate limit.

Spammer is an anti-spam mail filter for Sendmail and Postfix. It uses libmilter to communicate with the MTA. Spammer checks client IP addresses as well as all IP addresses in the "Received: " headers against a DNSBL database.

Protect your Server/Network against spammers. fw_spam queries a DNS-based Spam Database to detect spam listed ip-addresses. It is a userspace daemon, wich gets the packets from the iptables QUEUE target. You can configure the dns server, the firewall

TLim (Transaction Limiter) TLim is a patch that spam-hardens sendmail against both inbound and outbound abuse. TLim counts the number of transactions an IP performs. Should the IP violate admin-defined limits, it is sanctioned via a null route.