You have check two things
1.does the configurationis correct?
2.Is the smtp domain is blocked by firewall?
If you feel that the configuration's are correct then try to telnet the smtp domain in cmd [telnet domainname 587] if this is connect successfully then your machine can connect to the host smtp server, which means the configuration might be wrong ? Connection-timeout often comes when the domain is unreachable.
Still need help let me know!!
Hi Dipak Waghmare,
This is a common issue in Studio Pro. Sometimes, the Mendix server connection times out. You can fix it by stopping the server and running the application locally again. This should solve the error.