cPanel :: Berkeley DB error: PANIC: fatal region error detected; run recovery

Exim logs /var/log/exim_mainlog shows Berkeley DB error.

Berkeley DB error: PANIC: fatal region error detected; run recovery
Berkeley DB error: PANIC: fatal region error detected; run recovery
Berkeley DB error: PANIC: fatal region error detected; run recovery

Exim stores certain databases using BerkeleyDB (e.g. aliases file). These are due to corrupted Berkeley DB.

In cPanel server you can remove / move the DB and restart exim to fix.

mv /var/spool/exim/db /var/spool/exim/db.bak

/scripts/restartsrv_exim

Now confirm the errors are gone.

tail -f /var/log/exim_mainlog

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