fttNoTLSSupport

fttNoTLSSupport = 0

Example

function AllowsPlaintext(Mode: TvxTLSType): Boolean;
begin
  Result := Mode = fttNoTLSSupport;
end;

Usage

fttNoTLSSupport disables the protocol TLS mode and permits an unencrypted SMTP, FTP, POP3 or IMAP connection.

Additional Technical Info

fttNoTLSSupport is ordinal 0 of TvxTLSType. Velox maps it to Indy utNoTLSSupport; POP3/IMAP initialise to no TLS before applying configured mode, and email treats it as TLS = False.

No implicit handshake or explicit STARTTLS-style upgrade is requested. Credentials and message/file content can therefore cross the network in plaintext unless another independently configured tunnel protects the connection. Use only for a deliberately trusted/local legacy endpoint with an approved compensating control.

This member is separate from fstNoSSL, and Velox has both SSL-handler/version and TLS-mode settings. Review the complete effective configuration; do not infer secure or insecure transport from one enum alone.

The example only compares metadata and was source-reviewed; no TLS, network, credential, runtime or image test ran.

External references

• Indy TIdUseTLS source.

Created 2026-07-15