Hi,
You can have two types of status for your messages in the BizTalk MessageBox after such a failure:
1) Suspended messages are instances completely stopped. Either they will be non-resumable (in which case you can only save the message and terminate the service instance) or resumable, in which case you can “force” the message to retry processing but requiring manual intervention for this to happen.
2) Dehydrated messages are just temporarily stopped until some condition is triggered. For example, a send port that failed to delivered a message but
has not exhausted its retry count settings, will have the failed messages dehydrated until the retry interval passes and the transmission is attempted.
Daniel.