Hello,

I have a question for nginx masters.

I am using Debian Stretch, with Dovecot as a mail server, and two
webmails, Roundcube and SOGo. Roundcube is configured to pass the ID
command with the original IP address 'ID ( "x-originating-ip"
xx.xx.xx.xx )', so Dovecot logs the remote IP correctly, and not
127.0.0.1. So, I know my set-up us working fine.

However, there is a bug in SOGo, because the command is sent only after
authentication, and Dovecot logs the remote IP as 127.0.0.1.

Is there any way, by using nginx as an IMAP proxy, to inject the remote
IP address, from an environment variable, passed by the nginx instance
that serves the web frontend?


rip=12.34.56.78 ID (
"x-originating-ip" 12.34.56.78)
[nginx web frontend] => [Sogo backend] => [ nginx IMAP
proxy ] => [Dovecot IMAP server]

I have raised the bug on the SOGo web site, but I think it will be long
to fix, and I prefer to avoid recompiling the SOGo source code.

Thanks for your help and your ideas,
André
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