1 Confirm whether the source of the e-mail address is suspicious. Some do not rule out the possibility of trojan horse behavior. Don't click on links or download attachments.

Personal mailbox information disclosure can be simply checked, where the mailbox has been registered. This may lead to targeted advertising recommendations. Of course, some of them are obviously sent in groups and randomly. For example, let's see if your inbox is frequently used. For example, if few people's email addresses or mobile phone numbers start with QQ numbers, then this is normal.