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qpsmtpd is a flexible smtpd daemon written in Perl
qpsmtpd is a flexible SMTP daemon written in Perl, designed to be easily extensible through a plugin architecture. It serves as a drop-in replacement for qmail-smtpd and supports integration with various mail transfer agents, providing advanced spam filtering and email processing capabilities.
statmail is a nearly drop-in replacement for the `mailstat' program that comes with procmail. It aims at being faster and more correct than mailstat when computing e-mail statistics.
A daemon to detect spammers trying to harvest email addresses by username guessing and temporarily DROP them with iptables firewall rules. The program also looks for and kills sendmail processes that have been stuck in "cmd read" mode for a long time.
Auth0 Token Vault handles secure token storage, exchange, and refresh for external providers so you don't have to build it yourself.
Rolling your own OAuth token storage can be a security liability. Token Vault securely stores access and refresh tokens from federated providers and handles exchange and renewal automatically. Connected accounts, refresh exchange, and privileged worker flows included.
Trestlemail is a Mail Delivery Agent that works with Fetchmail to automatically redistribute multi-drop mail. Many ISPs dump all mail to a domain into a single global mailbox. Fetchmail will fetch the multi-drop mail and Trestlemail will distribute it. It