This file is indexed.

/etc/exim4/conf.d/retry/30_exim4-config is in exim4-config 4.76-3ubuntu3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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### retry/30_exim4-config
#################################

# This single retry rule applies to all domains and all errors. It specifies
# retries every 15 minutes for 2 hours, then increasing retry intervals,
# starting at 1 hour and increasing each time by a factor of 1.5, up to 16
# hours, then retries every 6 hours until 4 days have passed since the first
# failed delivery.

# Please note that these rules only limit the frequenzy of retries, the
# effective retry-time depends on the frequenzy of queue-running, too.
# See QUEUEINTERVAL in /etc/default/exim4.

# Address or Domain    Error       Retries
# -----------------    -----       -------

*                      *           F,2h,15m; G,16h,1h,1.5; F,4d,6h