Yesterday I upgrade my CentOS e-mail server and I changed the version of Squirrelmail and PHP. Now, after the changes, I can't send e-mail by squirrelmail. I can send only by e-mail clients like Thunderbird and Outlook in the network. I did a backup of the old configuration and data files and I replaced it on the new configuration, but nothing happen. I need someone's help. Thank you. Edson