Hi, I have a problem with sendmail. DSN: User unknown but the user email account is valid. I can send email in other domains like yahoo. hotmail, etc, but in our domain is not. Regards,
I recommend that you reconfgure your server as described in the perfect setup guide for your linux distribution and then reinstall ispconfig.
This problem has been resolved... I removed the sendmail and installed a postfix mail server. Thanks for your reply... Regards,