C:\php>pear search mail
Retrieving data...0%....50%..MATCHED PACKAGES, CHANNEL PEAR.PHP.NET:
=======================================
PACKAGE         STABLE/(LATEST) LOCAL
Mail            1.1.14 (stable)       Class that provides multiple interfaces for sending emails
Mail_IMAP       1.1.0RC2 (beta)       Provides a c-client backend for webmail.
Mail_IMAPv2     0.2.0 (beta)          Provides a c-client backend for webmail.
Mail_Mbox       0.5.1 (beta)          Read and modify Unix MBOXes
Mail_Mime       1.5.2 (stable)        Mail_Mime provides classes to create mime messages.
Mail_mimeDecode 1.5.0 (stable)        Provides a class to decode mime messages.
Mail_Queue      1.2.1 (stable)        Class for put mails in queue and send them later in background.
Net_Vpopmaild   0.1.0 (alpha)         Class for accessing Vpopmail's vpopmaild daemon

C:\php>pear install -f -a -o mail
downloading Mail-1.1.14.tgz ...
Starting to download Mail-1.1.14.tgz (17,537 bytes)
......done: 17,537 bytes
downloading Net_SMTP-1.2.10.tgz ...
Starting to download Net_SMTP-1.2.10.tgz (10,923 bytes)
...done: 10,923 bytes
downloading Net_Socket-1.0.8.tgz ...
Starting to download Net_Socket-1.0.8.tgz (5,441 bytes)
...done: 5,441 bytes
downloading Auth_SASL-1.0.2.tgz ...
Starting to download Auth_SASL-1.0.2.tgz (5,645 bytes)
...done: 5,645 bytes
install ok: channel://pear.php.net/Mail-1.1.14
install ok: channel://pear.php.net/Net_Socket-1.0.8
install ok: channel://pear.php.net/Auth_SASL-1.0.2
install ok: channel://pear.php.net/Net_SMTP-1.2.10