[webmin-l] read mail does not sent

[<we...@be...>]

Hi there,

I have the following problem;
If people sent email from within usermin / read mail then the mail just dissapears. I can't find anythinf in the log files. I am using sendmail and I found out that if I log in as root or send mail from webmin / read users mail it sents it nicely. So it seems to be a rights problem. But what should I change?
sendmail on freebsd 4.

Thanks,

Roger