Yes, there were few reports similar to this for FtpClient extension. Users were able to connect to the server with a particular connection ( either wifi or mobile) but not with both. It was quite random.
See this Stackoverflow answer: You have enabled Two phase authentication for your Google account and as a result applications will not be able to login to your Google account using the actual password. Google expects you to generate a application specific password for each application you use (and give it a name) and then use that password to login to your Google account from your application. This allows you to not give your password to third party application when you have 2-step authentication enabled. See here what to do.
bonjour j'ai ce code d'erreur quand je lance l'application avec l'extension smtp client voici le code d'erreur
com sun mail util mailconnectexception couldn t connect to host, port: stmp.gmail.com,465; timeout 10000