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Patch / add-on for qmail, written in C and using PostgreSQL as database backend in order to implement an anti-spam method known as "greylisting". The patch behaves and performs nicely, while reducing resources needed for handling email traffic.
This project provides an amended interface for the Sendmail Milter (libmilter) library which allows the SMTP envelope sender address to be updated by mail filter applications.
This software permits sendmail (via milter) and qmail (via a patch) to do per user configured dns blacklist checking. It will only allow or deny incoming mail, based on the configured set of lists which are checked. Tagging is not possible.
Deploy pre-built tools that crawl websites, extract structured data, and feed your applications. Reliable web data without maintaining scrapers.
Automate web data collection with cloud tools that handle anti-bot measures, browser rendering, and data transformation out of the box. Extract content from any website, push to vector databases for RAG workflows, or pipe directly into your apps via API. Schedule runs, set up webhooks, and connect to your existing stack. Free tier available, then scale as you need to.
qmail-monitor is a patch to qmail that offers mail monitoring (duplication) functionality on both incoming and outgoing smtp traffic. the monitor ruleset is intuitive and allows the administrator to make changes w/o restarting the server processes.
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.