Mailbox/retention policies can be tweaked, as well as mail flow ones by your administrator. With that said, depending on the combination of other antimalware/an

Mailbox/retention policies can be tweaked, as well as mail flow ones by your administrator. With that said, depending on the combination of other antimalware/antispam apps that your company uses and Microsoft being quite pushy about their antispam for some reason, even that may not be a perfect solution.