Power loss on exchange server where do emails go?

Question

Power loss on exchange server where do emails go?

Answer 1

They may lost immediately or be retried for delivery for a few hours and if the server is not brought back up they are lost-

Few suggestions, have your e-mail hosted somewhere with redundant power-

and have a failover Mail record in DNS that will route the mail to a backup if failed

Hostmysite.com has great options from colo hosting your box to Exchange servers that will avoid all the issues of email loss-