Red Hat Sendmail FAQ
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3.15 I think I accidentally goofed up the permissions on some of sendmail's directories. How do I fix this?

chmod go-w / /etc /etc/mail /usr /var /var/spool /var/spool/mqueue

chown root / /etc /etc/mail /usr /var /var/spool /var/spool/mqueue

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3.14 I have always used .forward files and now I'm getting an error which says: “sh: procmail not available for sendmail programs”. How can I fix this?Up3.16 Can I use sendmail 8.9.3 as either IMAP or POP3 server?