I have three sites in ISPConfig, and hay install Squirrelmail in the folder of ISPConfig /home/admispconfig/ispconfig/web/, I create folder call "mail", and work perfect, but there are a problem.
Domain Server name is www.domain1.com
open page Squirrelmail, and put a user name web1_Test1 (Test1@domain1.com), and go in. But if I try with user another domain web2_Test2 (Test2@domain2.com), I can see my mail, but the problem is when I send email dont go with the correct domain Test2@domain1.com
and the correcto mail should be Test2@domain2.com
Then I reinstall squirrel, but I put the install in them own folder Web /var/www/web1/web and make three installations of squirrelmail. One for each site, and I things than is not correct. Should be one installations for all sites in my server.