After installing xoops, all is working without complaints, except send e-mail messages. On standard "about the site" block, when trying to send "recommend" message, or when registering, get errors:
>> PHP Mail not supported;
>> SMTPAuth not supported;
>> SMTP not supported;
And when configuring to use sendmail, the form finish ok, but there are no message sent. There are no problems with the mail server, and the sendmail command line is ok.

Any tips?