Skip attachment filtering for one sender

> is it possible to unblock ( message filter) zip files from one domain "customer.com"
> at present we block all zip files but need these reports from them
> if so how please

As you are using a version of VPOP3 prior to v6.9, all you can do is not block any attachments from "customer.com"

To do this, go to the Settings -> Attachment Processing -> Filtering Conditions tab and in the 'Skip Filtering' box, add something like:

From: *@customer.com*