Sorry for the late response.
I went into the McAfee ePolicy Orchestrator 4.5.0 Console (this is the main server that deals with the antivirus). This maybe different depending on the version of EPO you are using but here is what I did.
Click on policy catalog
In policy catalog, Select viruscan enterprise 8.7.0 as the product (This should be the product that your company is using)
Select Access Protection Policies in the category selection
On the bottom pane you should see a Mcafee Deafault policy and maybe a policy called My default
On the right of 'My Default' policy, there should be an Edit setting link, click on the Edit Setting link.
This should take you to the Access Protection Page
There should be a drop down list\box called Select setting (on mine it is defaulted to Workstation)
Select setting for Server from the drop down list
Select Anti-virus Standard protection from the Access Protection rules
Highlight the 'Prevent Mass Mainling word from sending email'
Select the edit button
type in 'reportingServicesService.exe' into the process to exclude box and click ok
click save to save your changes
This is what I did to allow the SQL subscription to send the email to recipients.
Please note also that whenever or whoever updates to the latest EPO (McAfee ePolicy Orchestrator), the setting that you place above will be lost and you need to redo adding the 'reportingServicesService.exe' to the exclude list again. This is what I find out when coming in one morning to be inundated from users saying that they had no emails about their reports. Turns out that one of the IT guys who deals with the updating of servers, anti-virus, etc updated the EPO whilst I was away.