1.You can use a unique email account and different passwords.
2.Please make sure the two-step verification is active.
3.Please check the domain name before each landing: 55.com.
4.Please do not click any links and attachments in the mailbox.
5.Please select a reliable antivirus software and update it regularly.
6.Please encrypt your email and your cell phone.
7.Please make sure your computer is operated in a safe environment.
8.Please use a secure network.