I recently installed an RV180W in a small office environment to make use of its VPN capabilities but since installing, their outgoing emails have been randomly getting stuck "freezing" their email. Replacing the old router fixes the issue.
They are using MS Outlook 2010 and a hosted Exchange account.
I have tried the following with no success.
Most recent firmware
Disabled attack prevention settings
Allowed smtp through the firewall
Thanks in advance for any thoughts