Mail outgoing not working.

Mail outgoing not working.

Hello,

I was trying to send mail using outlook. But was unable to do that in fact i tried to do it via portal but i was not able to attache nor send a single mail. Via outlook small email are going so i tries with a 3g dongle instead a local wifi but the same result. Zoho mail server status is showing up-time but its not working.

Any solution?