javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 586; nested exception is: java.net.ConnectException: Connection timed out: connect

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Samebug tips

,
Expert tip

Check if your server (or a proxy server) is not going up and down. There might be something between a proxy and a client sending intermittent requests to non-functioning hosts as well. There might as well be too many requests in a short amount of time.

,
Expert tip

Check if your server (or a proxy server) is not going up and down. There might be something between a proxy and a client sending intermittent requests to non-functioning hosts as well. There might as well be too many requests in a short amount of time.

Solutions on the web

via Coderanch by Jawed Nazar Ali, 1 year ago
Could not connect to SMTP host: mail.sdfpak.org, port: 25; nested exception is: java.net.ConnectException: Connection refused
via Coderanch by ravi v kumar, 1 year ago
Could not connect to SMTP host: 10.45.26.62, port: 25; nested exception is: java.net.SocketException: Software caused connection abort: connect
via Coderanch by Mannu Pal, 1 year ago
Could not connect to SMTP host: smtp.gmail.com, port: 465, response: -1
via Google Groups by Damian Marinaccio, 3 months ago
Unknown SMTP host: smtp.niper.ac.in; nested exception is: java.net.UnknownHostException: smtp.niper.ac.in
via Oracle Community by 843830, 4 months ago
Could not connect to SMTP host: smtp.mail.yahoo.com.sg, port: 25; nested exception is: java.net.ConnectException: Connection refused: connect
via Stack Overflow by Lance Zhao Zai
, 3 months ago
Could not connect to SMTP host: smtp-mail.outlook.com, port: 587; nested exception is: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 586; nested exception is: java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:321)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:237)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1927)

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