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If you upgrade the Plesk control panel, the Atmail webmail client will display the “/etc/psa-webmail/atmail/.atmail.shadow open_basedir restriction” error message while accessing Atmail. The complete error message looks like follows:

Warning: fopen [function.fopen]: open_basedir restriction in effect.
File(/etc/psa-webmail/atmail/.atmail.shadow) is not within allowed
path(s): (/var/www/atmail:/var/log/atmail:/etc/psa:/tmp:/var/tmp)
in /var/www/atmail/libs/Atmail/Config.php on line 4

The error occurs when PHP is not allowed to access the /etc/psa-webmail/atmail/ directory due to open_basedir restriction in effect and thus any request to the /etc/psa-webmail/atmail/.atmail.shadow file is blocked by PHP.

The restriction is in place in the atmail configuration file located at /etc/httpd/conf.d/zzz_atmail_vhost.conf. To allow PHP to access the /etc/psa-webmail/atmail/ directory, open the Atmail configuration file

# nano /etc/httpd/conf.d/zzz_atmail_vhost.conf

look for the lines that state (there are 2 lines):

php_admin_value open_basedir "/var/www/atmail:/var/log/atmail:
/etc/psa:/tmp:/var/tmp"

and add the atmail directory at the end so the lines look like follows:

php_admin_value open_basedir "/var/www/atmail:/var/log/atmail:
/etc/psa:/tmp:/var/tmp:/etc/psa-webmail/atmail"

Save the file and restart the httpd service

# service httpd restart

PHP will now be able to access the atmail directory and Atmail webmail client will work without problems.

You may come across an error “Unable to install plesk-core-10.8.0-cos5.build package” while upgrading Plesk to 10.x on a CentOS server. The complete error message is as follows:

Error: Unable to install "plesk-core-10.8.0-cos5.build.13.x86_64"
package. Not all packages were installed.
Please, contact product technical support.

The error message does not indicate whether there is a conflicting or a missing package. However, Plesk stores detailed installation and upgrade logs in the /tmp/autoinstaller3.log file.

Open the file and scroll down to where it starts displaying error messages and you will notice something as follows:

The requested package "plesk-core" could not be installed.
Searching problems for the "plesk-core" package.
No suitable solutions were found for the "bind-utils" dependency.
The "bind-utils-30:9.3.6.x86_64" package resolves "bind-utils".

The “bind-utils dependency” error while upgrading Plesk indicates that the bind-utils and bind-libs versions installed by CentOS 5.x is greater than what is supported by Plesk.

To resolve the issue, you need to search and remove the bind-utils and bind-libs packages.

# rpm -qa | grep bind-*
# rpm -e --nodeps bind-utils bind-libs

Now run the Plesk autoinstaller again

# /usr/local/psa/admin/bin/autoinstaller

The Plesk autoinstaller will install the bind packages that is supported by Plesk and the upgrade will go through successfully.