[exim] Queue with manualroute option

Hi

My exim deliver messages for domain.com with manualroute option router.

This weekend NS server which handle domain.com failed and exim put all
these messages to frozen queue. The error was:
"no IP address found for host smtp.domain.com"

I have a special retry rule for them and thought that it should affect all
mail for domain.com:
domain.com        * F,1h,5m; F,14d,2h;

But bit later messages from queue removed with message "cancelled by
timeout_frozen_after".

I looked through docs and found that messages were removed because
timeout_frozen_after was set to 1d 😢

If i set "host_find_failed=defer" in manualroute will that keep all mail
for domain.com in queue in case of *any* DNS (network) error and do not
freeze them?
I did not used host_find_failed before...

Thanks.

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