Each email account is used as a universal identifier of a person on the network. The most dangerous misconception about which all security measures are broken is the idea that I am a small person and my mail correspondence is not needed for nothing. This is not the case. Even small people sometimes have their little secrets that they dont want to share. Sometimes personal correspondence, photos, and other data become a reason for banal blackmail. Change your password periodically, especially if you found out that some service where you had an account was hacked.”]
Source: https://gbhackers.com/how-to-protect-your-email-from-hacking/