I have installed Zimbra Release 6.0.1_GA_1816.DEBIAN5_64 DEBIAN5_64 FOSS edition. I need to add an extra alias file to the postfix configuration. I modified the /opt/zimbra/postfix/conf/main.cf file with this:

alias_maps = hash:/etc/aliases,hash:/etc/mail/sympa_aliases

And after that I run the command:

# /opt/zimbra/postfix/sbin/newaliases

But, now the mail service is not working because of:

Jan 4 14:34:43 estafeta1 postfix/smtpd[16471]: fatal: open database /etc/mail/sympa_aliases.db: No such file or directory

The .db file is not created by the newaliases command. How can I create the .db file?