Download this document with a preset filter. Go to your Gmail account and hit the settings wheel.
Click “See all settings”
Choose “Filters and Blocked Addresses” block.
Click “Import filters”.
Then “Choose file” and upload the filter you downloaded in the first step.
Then click “Open file”.
And “Create filters”.
It will appear in your filters’ list
Now you won’t see any warm up messages between your usual correspondence.