No email connectivity after upgrading to V94 FW on R7500

If other internet access is working (e.g. web browsing) through wifi then your router is fine.  Your router works at the packet level and doesn't care about the contents.  Email and web all look the same to the router.  The only exception is if you have set up some firewall rules that block specific ports: this could then impact email but not web.  However, unless you've specifically set this up, it won't be the case.  Therefore, if it's only email you have problems with, look to your ISP or email settings on your laptop.  It's not your router.