strange problem!!

Hi ,my name is Ali and iam new to mikrotik .
iam having a problem and i need some prof. help

here is the problem:

my users cant access their email acounts and some HTTPS sites and they cant login to messengers ,all messengers !!
I tried to change the MTU as my servers value(1400) ande the problem still the same .
I tried to add some firewall and mangle rules but it didn`t work even i tried to delete all firewall rules but nothing happened

note:if i access these sites directly from my satellite router (without RouterOS) the problem willnot occur.


any suggestions??
:confused:

ROS version ?

my RouterOS version is 2.9.27


hai frens
i think better upgrade first to newest version.. please.!!! :wink: , upgrade it with netinstall is recommended
with latest updates more powerfull

regards
Hasbullah.com