Last Updated on April 19, 2021 by admin
If your mail server stops working (neither incoming nor outgoing email works) and you find the following error message in the mail.log file:
fatal: open database /var/lib/postfix/smtpd_scache.db: File exists
then the smtpd_scache.db might got corrupted. Postfix will recreate this file if it does not exist. So it can be removed to solve the issue:
rm -f /var/lib/postfix/smtpd_scache.db
Thanks to Alexander Fox for sending me this FAQ.