(after 1 week)
Mail Admin: "We received your request. After an in-depth study, we found that we can't do much about it. Because the source of the spam is coming from our business partner. We'll pass this case to Security Forensic team for further investigation."
(after 3 days)
Forensic team lead: "Hi Mail Admin, we confirm that this is a real spam from our business partner. However, we cannot simply block them at the mail gateway. Or else it may cause some legal issue with our business partner. We'll have a discussion with legal team for further action."
(after 1 week)
Legal team : "Hi, forensic team! Unfortunately the answer is No. We can't block [ ALL ] their emails. This will cause the loss in business and if we can't receive email from the business partner, we may be having legal issues with them. No, please don't do anything stupid."
(after 3 days)
Forensic team: "Hi Mail Admin, there is nothing much I can do. The advice from the legal team is [ no ]. Please advise the user that we can't afford to loss the business. And make sure our mail gateway never ever [ block ] any email from the business partner."
(after 1 week)
Mail Admin: "Hi user, after some discussions with forensic and legal teams, we would not will never block the spam mail (from the business partner) for you. It may involve complicated legal issue and the loss of business."
"However, we'll offer you another solution. You may configure a filter in your Outlook to filter all the emails for you. With this, you will not see any more spam mails. Please follow the instruction at our sharepoint site. There is a detail step-by-step instruction there."
User: "Thank you very much, Mail Admin. It really solve my problem now after I follow the instructions from the sharepoint site."