Orbi Blocking my IMAP server

What is the Mfr and model# of the ISP modem the NG router is connected too?

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RBR20_user wrote:

I cannot connect to my email provider imap.onebox.com on any device on the wifi or LAN. I can ping it no problem. If i connect directly to cable modem i can retrieve emails on laptop. Same with phone if I turn off wifi and go cellular.

I have defaulted Orbi and power cycled cable modem to no avail.

I have also tried to add a service  via security>block services>allow>and added imap port 143.

also added https 443.

Firmware is current V2.3.5.26

 any ideas????

 

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