Option 1: Increase your counter-intelligence. This should help, as I think that for a faked message to succeed it has to beat the counter-intelligence for both parties.
Option 2: Fake Messages to everyone else. If the enemy is at war on multiple fronts, they won't be able to focus entirely on you.
Option 3: If your allies are so foolish so as to believe a obvious ruse such as that, then teach them a lesson by destroying their empire under the heel of your boot. No one can stop you now, after all.
-Hotfoot
"Note: Option three is for G++++ players."
Option 4: Wait for patch 1.42 which was supposed to have been ready Last month, it is supposed to fix the counterintelligence bug that makes most of your counterintel ineffective.
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