--- title: Using PostboxPrint™ with McAfee Endpoint description: How to access PostboxPrint™ application when using McAfee Endpoint Anti-virus --- [Skip to content](https://support.postworks.co.uk/knowledge/using-postboxprint-with-mcafee-endpoint-anti-virus#main-content) ![Logo (transparent background, red emblem, red text, tagline NOT included) (PRIVATE).png\]](https://support.postworks.co.uk/hs-fs/hubfs/Logo%20(transparent%20background%2c%20red%20emblem%2c%20red%20text%2c%20tagline%20NOT%20included)%20(PRIVATE).png?height=40&name=Logo%20(transparent%20background%2c%20red%20emblem%2c%20red%20text%2c%20tagline%20NOT%20included)%20(PRIVATE).png) Open main navigation Close main navigation - [Postworks Portal](https://app.postworks.co.uk/dashboard/send) [Postworks Portal](https://app.postworks.co.uk/dashboard/send) Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Support Centre](https://support.postworks.co.uk/knowledge?hsLang=en) 2. 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[Using PostboxPrint™ with Antivirus software](https://support.postworks.co.uk/knowledge/postboxprint?hsLang=en#using-postboxprint-with-antivirus-software) # Using PostboxPrint™ with McAfee Endpoint ## How to access PostboxPrint™ application when using McAfee Endpoint Anti-virus If you are: **a)** using McAfee Endpoint anti-virus and; **b)** receiving an error message when you try to upload a letter via PostboxPrint™ application: Then please see the below instructions on how to access the PostboxPrint™ application in order to send your post:  **1.** Open the McAfee control panel **2.** Go to *Threat Prevention* ![](https://help.veriato.com/products/veriato-recon-360/win/en/antivirus/McAfee_files/image001.png) **3.** Within *Threat Prevention*, select *Advanced Settings* **4\.** Go to *Options* **5.** Scroll down to the second table of information on the page (this should show a set of rules that can be ticked and un-ticked) **6.** Un-tick the rule that says *Suspicious double file extension* **7.** Apply settings **8.** Try uploading another letter via PostboxPrint™ If you are still unable to successfully post a letter via PostboxPrint™ application, our friendly support team can be reached by email at [**support@postworks.co.uk**](mailto:support@postworks.co.uk) or via the online chat when logged into the **[Postworks Portal](https://hub.postworks.co.uk/)**.     - 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