When trying to send mail, sendmail can not mail it, you get the message below:
"cannot open 'etc/mail/sendmail.cw' Group writeable directory"
For security reasons, the default sendmail configuration doesnt allow sending mail or running files in a group writeable directory.
This situation is problematic since in UP1 for SD 3.7, VDS/etc/mail directory has a sticky bit to it and its group writeable.
In order to let sendmail run in group writable directories, the default configuration is changed in VDS/etc/mail/sendmail.mc :