Just set up this new router to replace an aging VR2800. All web port forwards work as expected, even obscure app ports. But any port required for email is blocked.

Not ISP related as this all worked yesterday before changing over the router and I have confirmed by logging into my account.

Tried downgrading back to 1.0.11 and same result.

If this doesn't work I will need to try a different router I think or replace the firmware with openWrt or similar.

My business email server sits behind this router so this is necessary to be working.