[Exim] Where is relayed mail queued?

My machine is the secondary MX for another machine and I set it up to
relay for it. Now this other machine is down.

Where does exim place the queued mail? I tried doing a mailq but nothing
showed. (I assume mailq is for local mail?)

When I send an email to the downed machine, I don't receive any bounces so
I assume that it is getting queued.

Thanks

  Jeremy C. Reed
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