Some MLS systems allow you to have their property alert emails sent to both the contact and the agent, if these are on the same email they will sync to Follow Up Boss, like other email communication with the contact. If these are separate emails they will not sync to Follow Up Boss
Note: Most MLS systems do not send the email to the agent's inbox and the contact on the same email and so can't sync these emails which is a good thing as having all these emails in Follow Up Boss clutters up the contact timeline and makes it harder to find actual contact communication and notes, where possible we definitely recommend not having these emails synced to Follow Up Boss.