Personally, I think it's better to use 139 mailbox to receive it! Because credit card bills belong to personal privacy, qq and 163 are relatively easy to be stolen, so privacy leakage is not good, and there is more junk information. 139 login reminder, in case someone wants to log in to your email, you can lock the email in time after receiving the login notification SMS; There is also an email arrival notice, which can be checked in time after receiving the bill, and a credit card repayment reminder can be set in the calendar to facilitate regular notification every month. This is my suggestion, which I hope to adopt.