Automatic Email reports brake

Hi all!

I have a script running to send out automatic emails and it has been working just fine for a long time.

I run same test cases on my computer and on a remote server. 

For some reason, all of a sudden it stopped working on the server (error I get attached).

Same script works just fine on my machine. 

Here is the script:

function Test()
{
if (SendMail("rmarchuk@venturetechsolutions.com", "relay.ventureresource.local", "Roman Marchuk", "rmarchuk@venturetechsolutions.com",
"Regression MCF CA, Lighthouse and NFDM QA (All Groups)", " MCF Report attached. \n Groups tested: \n Canada: 1, 2, 3, 4 for both CCCS CA and Debt.com \n Lighthouse: 1, 2, 3, 4 (Debt.com & Lighthouse) \n NFDM: 1 and 2 \n \n Thank You!", "V:\\TestComplete\\Reports\\Report_MCF_2.mht"))
Log.Message("Mail was sent");
else
Log.Warning("Mail was not sent");
}

What can be wrong?

See attachment.