r7000 AC 1900 Smart Wifi router blocks Outlook from connecting to the outgoing smtp server

Two weeks dealing with Suddenlink technical support but same issue.  New Orbi RBR40 blocks outbound smtp email and inbound imap (all ports whether ssl or not) from being sent out from pc/outlook.  Same pc/outlook config works fine when connected to Internet via iPhone hotspot or old Apple Extreem router.  Did reset of Orbi and much more but no joy.  Suddenlink tech says they cannot 'see' the Orbi on the back side of their Aris Modem (may or may not be a hint as to problem ... not sure).

Final solution was to 'chain' the new Orbi to the old Apple Extreme.  Best of both worlds.  Now Suddenlink 'sees' the Apple Extreme and pc/outlook send/recieve smtp/imap email just fine.  The 'chained' Orbi + satellites give great wifi coverage in the house.