Send email from a different computer in a executable file

[kyjdp]

Now change the port settings, prompted the following error, I did not find the option of TLS, I hope to be able to point it out, thank you
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Error (RT) in <open ":1: /0">Macro1: [Error: Negative or void server response] (0x7A)
Server response: 530 5.7.0 Must issue a STARTTLS command first