Outlook 2021. Emails being received with Signatures. Images being received as attachments ! Help !

We have a user who is now using Outlook 2021 everytime he receives an email that contains a company signature that contains pictures the email shows these as attachements. He doesnt want this he just wants to see the valid attachements such as a word document, execl file etc...

He Outlook 2021 is pointing to his 365 mailbox.

Any ideas as its driving him crazy and having a go at me because of it !