The email will be resend. You can see the mails in the queue with the command:
And second question. I have enabled the spamfilter for this domain under spamfilter, user, domain. But are the spammails deleted or will they be kept in a sperate mailbox. Because i use mail routing no mailboxes for the domain are available so i wonder what happens with this spammails
It happens with the emails what you configured in the spamfilter policy, thats normally marking the ubject of spam emails so that exchange can sort them out and if the spam score is above a certain level, then delete the emails.