Problem when deliveryng some E-Mails - SMG 10

Hello Everybody, I have two appliances one for Inbound and other for Outbound. I have problem with the outbound, when I Email these domains techsteelsac.com and traxys.com I have problems, in the first one appeasr this error "connection timed out; no servers could be reached" and in the second one the Email goes to the recipient but they take some time (15 or 20 minnutes aprox).

I was doing some tests with the first one using the NSLOOKUP tool and in the outbount appliance appears the error "connection..." and when I do the same test on the Inbound appliance it is being resolved.

Why, I don´t know.

I thank you you help me.

Regards,

Lenin