thanks David,
we have an MS based application, using CDO.Message class for send emails
when we ran the application in a specific computer, we got an error of "transport ... 465"
why 465? we didn´t know
then, we tested with telnet, and got the same error message
we realize taht the problem was not on our application, but in something in the computer
this is the reason we've tested with telnet, at a lower level
I want to keep avast scanning outgoing messages
but I need the application send them trough port 25, not 465
TIA