Voici ce que j'ai coté webmail :
Optional PHP extensions
These are optional modules Atmail can utilize for the Webmail interface. If any are not installed Atmail can continue to run with the feature disabled.
Installed - openssl, enables Secure IMAP and POP3 connections
Installed - imap, Enables PUSH and Sync support for iPhone, Windows Mobile and ActiveSync devices
(pas bon) ldap - Will enable Atmail to search LDAP servers - View php info() | LDAP Info
(pas bon) ImageMagick - Optionally install ImageMagick to create thumbnails of PDF attachments | ImageMagick Info
Installed - gd, enables resizing, cropping and adding effects to Contacts' photos
Installed - dom, enables use of the HTMLPurifier HTML input filter which will help protect users from XSS attacks
PHP.ini Settings
The default configuration file php.ini is recommended to be set with the values below for Atmail. If settings are not as recommended you may need to change the php.ini with the values suggested below for Atmail to function correctly
Safe mode, required OFF - Atmail requires safe-mode off by default
set_include_path() - Atmail requires the ability to set the include path.
(pas bon) open_basedir, recommended NO RESTRICTION, currently an open_basedir restriction is in place. This is often implemented by hosting providers for shared hosting environments to restrict PHP access to the current vhost's directory - This may result in some slightly reduced functionality due to some system binaries not being available to Atmail. View php info()
Register globals, recommended OFF - This feature is recommended to be turned off for security
(pas bon) Magic quotes, required OFF, current value ON - The magic_quotes_gpc setting must be turned off in the php.ini . Atmail automatically quotes data and this setting is not required View php info()
File uploads, recommended ON - Required for attaching files to emails
Max Filesize Upload, recommended 16M or higher - Recommended max fileupload size for attachments
Maximum Size of POST data, recommended 16M or higher - Recommended max post size for attachments
Mais c'est beaucoup mieux que ce que l'on avait avant
il ne reste plus que :
(pas bon) ldap - Will enable Atmail to search LDAP servers - View php info() | LDAP Info
(pas bon) ImageMagick - Optionally install ImageMagick to create thumbnails of PDF attachments | ImageMagick Info
Mais malgrés ça, l'installation du webmail se fait jusqu'au bout et j'arrive à me connecter à l'interface d'admin