Opportunistic TLS Router for IIS SMTP Service
Platform:
Windows XP or later (32bit/x64)
IIS SMTP Service installed
Redirect email messages from outbound TLS enabled IIS SMTP Virtual Servers to a Plain TCP IIS SMTP Virtual Server in case of TLS not supported by recipient server.
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Getting Started
How Opportunistic TLS Router works in IIS SMTP Service?
TLS Router checks if the remote server supports TLS before the current SMTP server sends the email to the remote server.
- If the remote server supports TLS encryption, the current SMTP server to send the email to the remote server directly.
- If remote server doesn’t support TLS encryption, it will forward the email to the Plain TCP Virtual Server, which in turn will send the email to the remote server using a plain TCP connection.
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