According to the Windows Sockets Error Codes, the Socket Error # 10060 means the following: A connection attempt failed because the connected party did not properly respond after a period of time, or the established connection failed because the connected host has failed to respond. This could mean that the SMTP server you've specified does not reply in time, so the attempt to connect to the SMTP server fails.
Could you please clarify what SMTP provider do you use and what port do you specify in the SMTP settings window? In addition, please also try changing the port number and see if it works this way.
Could you please also let me know what version of Remote Utilities do you use? The issue might be caused by the TLS version which was fixed in the 6.12 Beta 2 release as we have implemented a TLS 1.2 support when sending emails using the "SMTP" feature.
In case if you're using version 188.8.131.52 of Remote Utilities or older version, then please try updating to the latest 6.12 Beta 2 version and see if it works for you. Version 6.12 Beta 2 of Remote Utilities is available for the download on this page.