@Bunnz said in "proxy handshake error"/"Failure when receiving data from the peer" when using proxy with Mail Module:
And proxy is working in HTTP request just fine
email ports are disallowed for these proxies.

Received HTTP code 502 from proxy after CONNECT
This error appears after connected to proxies, proxies are luminati based, i don't know why this happens something if there 40% success rate, 60% is failed with this error, trying to ignore with 'Ignore Fail' but still occours, can someone please help me to fix this issue?