Dear expert,
Facing weird problem.
Email client apps are showing error (ex - Thunderbird and Outlook) when connecting Lan from Mikrotik.
There is no additional rules except a src nat and default route to WAN.
When connecting directly to a device using Public IP or even from a TP-Link router (normal wireless)
There is no error.
Tested with two models (RB-450G) and (RB-2011-2Hnd), firmware version: 6.45
Seeking urgent help, if any one can advise.
BR
Shaikat