If the user has not applied for a bank card before, then the email received is likely to be an advertising email or a fraudulent email. At this time, it is necessary to carefully screen.

QQ mailbox is a mailbox product launched by Tencent in 2002, which provides users with safe, stable, fast and convenient mail service. Free value-added mail service has been provided for more than 654.38 billion mailbox users. QQ mail service is backed by high-speed telecom backbone network, and has a unique independent overseas mail export link, which is not affected by domestic and foreign network bottlenecks and transmits messages globally. Adopt a highly fault-tolerant internal server architecture to ensure that any failure will not affect the use of users, log in to the mailbox stably anytime and anywhere, and send and receive emails unimpeded.