Hi Tim! First, the service shouldn't crash when deleting larger mailboxes, but if the server is limited on resources I could see this causing performance issues at the very least. Next, to recover the contents of your inbox you can try deleting the mailbox.cfg file in the Inbox folder on your account with the SmarterMail service stopped, then start it up and check for inbox completion. If you continue to have issues with that I suggest submitting a support ticket so we can check this out. Thanks for reading. Have a great weekend!