Group writable directories (for example,
drwxrwxr-x permissions) are considered unsafe by recent versions of sendmail. Attempting to "make" the sendmail configuration or trying to start sendmail will fail with a "Group writable directory" error if there are any group writable directories in the path to the configuration files or to sendmail.
What to do
Check all directories in the path using
ls -l, and change any group writable directories to
In addition, sendmail has developed its own command,
DontBlameSendmail, which can be used to change file and directory permissions that you consider to be too restrictive. The command was given this name to make users aware of the risks associated with loosening permissions. For available options, see the sendmail website.