I had this same problem and after the last stability/patch update I could delete most of my in-game email. Happened on both of my characters for Federation and Klingon. I think the latest before this morning's scheduled patch was 235MB. It took me 10 minutes to delete all the in-game email I could. I had well over 200…
Keep in mind this includes if the target cloaks or is destroyed. When destroyed your ship will may automatically target the next enemy, but you still need to tell it to actually start firing despite auto-firing being turned on. In the heat of combat I keep forgetting this and wonder why my weapons stopped firing when…