[stunnel-users] How to pass remote IP to local SMTP/POP3 server

Wed Mar 7 20:14:02 CET 2012

Zdenek Valach wrote:
> Is there way how to make Stunnel for example after each
> establishment of TCP connection to send to SMTP/POP3
> server port some special command like
>
> REMOTEIP 123.123.123.123<crlf>

Good news:
This feature is already available in stunnel since version 4.45.

To enable it add the following line to your stunnel.conf:
	protocol = proxy

Protocol description:
	http://haproxy.1wt.eu/download/1.5/doc/proxy-protocol.txt

Best regards,
	Michal Trojnara
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