Hi
I used the instruction below to build a mail proxy server with nginx:
https://www.nginx.com/resources/admin-guide/mail-proxy/
I configured it for IMAP, POP3 and SMTP.
It's working quite well but I don't see the real IP of the sender in the mail header. When a user is sending a mail via SMTP, I see only the following in the mail header:
X-Sender-Id: _forwarded-from|46.xxx.xx.xx
For me it's important to see the real IP of the sender in the mail header, otherwise our outgoing spam filter will not like this solution.
How can I add the real IP of the sender to the mail header?
Regards
Michael
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