Yahoo Mail Proxy not properly setting HTTP headers
The Yahoo Mail proxy is not properly setting the 'X Forwarded For IP Address' in the HTTP header. For any web platform that checks that the Client IP Address is equal to the X Forwarded For IP Address as an anti-spoofing measure this will cause issues.
User agent for these requests is:
YahooMailProxy; https://help.yahoo.com/kb/yahoo-mail-proxy-SLN28749.html
Examples of IP address that X Forwarded For is getting set to:
98.138.219.28 (A-YAHOO-US9)
69.147.93.14 (A-YAHOO-US5)
69.147.93.139 (A-YAHOO-US5)
Which I assume are the Yahoo Mail Proxy servers.
It would be great if you could fix this.
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Rupert Galea
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We’d like to look more into this, please send us a DM on Twitter at @YahooCare, containing your Yahoo ID and a screenshot of your experience.