yes i have read it and change is but without any effect
copy /usr/local/psa/admin/conf/templates/default/domainWebmail.php
to
/usr/local/psa/admin/conf/templates/custom/domainWebmail.php
and change in file
"webmail.<?php echo $VAR->domain->asciiName ?>"
to
"<?php echo $VAR->domain->asciiName...