Evolution delivers the following features:
E-mail retrieval with the POP and IMAP protocols and e-mail transmission with SMTP
Secure network connections encrypted with SSL, TLS and STARTTLS
E-mail encryption with GPG and S/MIME
E-mail filters
Search folders: saved searches that look like normal mail folders as an alternative to using filters and search queries
Automatic spam filtering with SpamAssassin and Bogofilter
Connectivity to Microsoft Exchange Server, Novell GroupWise and Kolab (provided in separate packages as plug-ins)
Calendar support for the iCalendar file format, the WebDAV and CalDAV standards and Google Calendar
Contact management with local address books, CardDAV, LDAP and Google address books
Synchronization via SyncML with SyncEvolution and with Palm OS devices via gnome-pilot
Address books that can be used as a data source in LibreOffice
User avatars loading from address book, e-mail headers X-Face, Face or automatic lookup by hashed e-mail address from Gravatar service
An RSS reader plug-in
Import from Microsoft Outlook archives (dbx, pst) and Berkley Mailbox

The Novell GroupWise plug-in is no longer in active development.
A Scalix plug-in is also available, but its development stopped in 2009.
Evolution delivers the following features:
E-mail retrieval with the POP and IMAP protocols and e-mail transmission with SMTP
Secure network connections encrypted with SSL, TLS and STARTTLS
E-mail encryption with GPG and S/MIME
E-mail filters
Search folders: saved searches that look like normal mail folders as an alternative to using filters and search queries
Automatic spam filtering with SpamAssassin and Bogofilter
Connectivity to Microsoft Exchange Server, Novell GroupWise and Kolab (provided in separate packages as plug-ins)
Calendar support for the iCalendar file format, the WebDAV and CalDAV standards and Google Calendar
Contact management with local address books, CardDAV, LDAP and Google address books
Synchronization via SyncML with SyncEvolution and with Palm OS devices via gnome-pilot
Address books that can be used as a data source in LibreOffice
User avatars loading from address book, e-mail headers X-Face, Face or automatic lookup by hashed e-mail address from Gravatar service
An RSS reader plug-in
Import from Microsoft Outlook archives (dbx, pst) and Berkley Mailbox

The Novell GroupWise plug-in is no longer in active development. A Scalix plug-in is also available, but its development stopped in 2009.
GNOME Evolution