@mewmew No linux email server that I know of has its own webmail client. Most common and generally useful are postfix and exim, using dovecot for imap access and roundcube for webmail. If you're looking for a simple solution cPanel is great for web and email hosting, and is based on exim, dovecot, and several webmail clients including roundcube.
@mewmew I think roundcube is in PHP, so should use a basic LAMP or LEMP stack, and uses IMAP for access to the email server (hence the dovecot).
@mewmew Easiest solution, however, is to get a shared hosting package at HostGator or my hosting at resplendentwebservices.com; email and webmail are already set up and easily administered via web GUIs. That is, unless you're planning to do something illicit...
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