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This Perl module provides routines for checking validity of email address. It makes several checks: 1. It checks the syntax of an email address. 2. It checks if there any MX records or A records for the domain part of the email address. 3. It tries to connect to an email server directly via SMTP to check if mailbox is valid. It uses a combination of MAIL and RCPT commands which simulates sending an email. It can detect bad mailboxes in many cases.

This module is a versatile and extensible implementation of the SMTP protocol and its different evolutions like ESMTP and LMTP. The event driven object-oriented API makes easy to incorporate the SMTP protocol to your programs. Other SMTPd implementations don't support useful ESMTP extensions and the LMTP protocol. Their interface design precludes adding them later. So I've decided to rewrite a complete implementation with extensibility in mind.

This module analyzses a Mail::Internet object and returns a Mail::ListDetector::List object representing the mailing list the email was sent to, if any. The RFC2369 mailing list detector is also capable of matching some Mailman and Ezmlm messages. It is deliberately checked last to allow the more specific Mailman and Ezmlm parsing to happen first, and more accurately identify the type of mailing list involved.

Sendmail::Milter provides users with the ability to write mail filters in Perl that tightly integrate with sendmail's mail filter API. With this module, you can define and register Perl callbacks with the Milter engine. This module calls your perl callbacks using interpreters from a threaded persistent interpreter pool. Milter contexts are presented using an object-oriented style interface for performing operations on a Milter context.

SquirrelMail is a standards-based webmail package written in PHP. It includes built-in pure PHP support for the IMAP and SMTP protocols, and all pages render in pure HTML 4.0 (with no Javascript required) for maximum compatibility across browsers. It has very few requirements and is very easy to configure and install. SquirrelMail has a all the functionality you would want from an email client, including strong MIME support, address books, and folder manipulation

PGPsendmail is a drop-in wrapper for the standard sendmail programme which resides as /usr/sbin/sendmail on most Unix systems. It allows the automatic encryption of outgoing messages by using the recipient's PGP public keys. It does *not* provide for automatic decryption of incoming messages: such a feature would necessarily involve compromising your passphrase. However, it can provide for automatic signing of outgoing messages by using PGPdaemon.

Rate-limited autoresponder for qmail: - Limits rate of automatic responses (defaults to a maximum of one message every hour). - Will not respond to nearly every type of mailing list or bulk email. - Will not respond to bounce messages or MAILER-DAEMON. - Bounces looping messages. - Can insert the original subject into the response. - Can copy original message into response. - Can use links in the rate-limiting data directory to limit inode usage to a single inode. - Optional support for MySQL

Elmo (ELectronic Mail Operator) is an ncurses-based program for receiving, filtering, reading, composing, and sending mail from a character terminal. It speaks POP3 and SMTP and can work with maildir or Berkeley-formatted mailboxes. This version is a development version, but is rather stable, and is known to work better than the stable version on FreeBSD 4.x. Before running elmo, users should run elmoconf.pl to generate an ~/.elmorc file.

This extension will display the current status of your IMAP quota in thunderbird's statusbar and will warn you when you reach a configurable limit. It only works with IMAP quotas and servers advertizing the quota status via IMAP (the IMAP GETQUOTA command). Some mail servers have disk quotas and will send email when your mailbox reach its quota. That's not a real IMAP quota system and the imap server might not advertize it.

ARPACK software is capable of solving large symmetric, nonsymmetric, and generalized eigenproblems. The software is designed to compute a few (k) eigenvalues with user-specified features, such as those of largest real part or largest magnitude. Storage requirements are on the order of n*k locations, and no auxiliary storage is required. A set of numerically orthogonal Schur basis vectors for the desired k-dimensional eigen-space is computed. Numerically accurate eigenvectors are available on request.