For the first time ever, I received this email too...
Prepare for your upcoming United flight on ....
Dear xxxxxx,
Thank you for choosing United for your upcoming travel plans. You will find many helpful links in this email, which can assist you in managing your reservation and preparing for your trip.
You can also visit our Traveler guide page, for additional information including:
• Airport terminal locations
• Recommended check-in times
• Baggage policies
• ID and documentation information
• In-flight services
A full week before my flight. Nice touch, but curious how they decide to put these out.