问题...我们的防火墙设置不允许设置中未列出的任何其他端口.要求管理员添加它，它现在不显示此错误消息....！！我已经发送并发送消息，但自过去 5 分钟以来没有收到.我知道不能保证 APNS 消息.会再等一段时间.希望它到达.. :)

Gotcha...Our firewall setup to not allow any other ports not listed in settings. Asked admin people to add it and it doesn't show this error message now....!! I have sent and message but didn't receive since last 5 minutes. I know that APNS messages are not guaranteed. Will wait for some more time. Hopefully it arrives.. :)