The issue is because of the corrupted exim db files. Goto /var/spool/exim/db and delete files: retry , retry.lockfile , wait-remote_smtp, wait-remote_smtp.lockfile /etc/init.d/exim restart it should resolve your issue
See MoreTag: Exim error
Exim : retry time not reached for any host after a long failure period
The issue is because of the corrupted exim db files. Goto /var/spool/exim/db and delete files: retry , retry.lockfile , wait-remote_smtp, wait-remote_smtp.lockfile /etc/init.d/exim restart
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