When i try attach *.doc file, HTML Client say:
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" A client error occurred. Please try again."
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2019/08/23 14:41:23 [info] 17246#0: *188646 epoll_wait() reported that client prematurely closed connection, so upstream connection is closed too while SSL handshaking to upstream, client: 185.13.112.115, server: mail.example.com, request: "GET /img/zimbra/ImgCancel.png HTTP/1.1", upstream: "https://1.2.3.4:8443/img/zimbra/ImgCancel.png", host: "mail.example.com", referrer: "https://mail.example.com/h/search?si=0&so=0&sc=150&st=conversation&action=compose"
2019/08/23 14:41:23 [info] 17246#0: *188650 peer closed connection in SSL handshake while SSL handshaking, client: 185.13.112.115, server: 0.0.0.0:443
2019/08/23 14:41:28 [warn] 17246#0: *188654 a client request body is buffered to a temporary file /opt/zimbra/data/tmp/nginx/client/0000001898, client: 185.13.112.115, server: mail.example.com, request: "POST /h/search?si=0&so=0&sc=150&st=conversation&action=compose HTTP/1.1", host: "mail.example.com", referrer: "https://mail.example.com/h/search?si=0&so=0&sc=150&st=conversation&action=compose"