. . . . "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 is now also compatible with Postfix, Exim, sendmail and virtually any software that \"speaks SMTP\". It has a flexible plugin system, making it easy to interoperate with other pieces in a mail system.Its main purpose is to allow mail administrators to perform more advanced spam filtering than is possible with other SMTP daemons."@en . "qpsmtpd"@en . . "0.91" . "0.94" .