I have an important (+10 outlook accounts) but very ignorant client who refuses to accept that there is malware on the company's computers. Malware that steals Outlook data to send and receive spam. The situation went on a limit, due to the stubbornness of the client and with that I decided to raise the anti-spam filter. That started to make the customer more satisfied because he no longer receives return messages associated with the malware (lots of Chinese messages). It is not a sustainable situation because normal messages are being filtered.
Any suggestions (without being rid of the client), please?
PS: I'm not the network administrator of this company (who thinks just like the customer!) just the website and email service provider.