It is an Internet standard for electronic mail (e-mail) transmission across Internet Protocol (IP) networks.SMTP connections secured by SSL are known by the shorthand SMTPS, though SMTPS is not a protocol in its own right.
Smtp Ing Tutorials Password When ConnectingTo use SMTP authentication youll need to set the mail.smtp.auth property or provide the SMTP Transport with a username and password when connecting to the SMTP server.This approach allows you to use the static Transport send method to send messages.Defaults to msg.getFrom() or InternetAddress.getLocalAddress(). Should not normally need to be set if your JDK and your name service are configured properly. Only mechanisms supported by the server and supported by the current implementation will be used. The default is LOGIN PLAIN DIGEST-MD5 NTLM, which includes all the authentication mechanisms supported by the current implementation. Typically used by a mail relay to pass along information about the original submitter of the message. Either NEVER, or some combination of SUCCESS, FAILURE, and DELAY (separated by commas). If set to false (the default), the message is not sent to any of the recipients if there is an invalid recipient address. If set to true (the default), causes the transport to wait for the response to the QUIT command. Defaults to false for the smtp protocol and true for the smtps protocol. If set to a whitespace separated list of hosts, those hosts are trusted. ![]() The property value is a whitespace separated list of tokens acceptable to the javax.net.ssl.SSLSocket.setEnabledProtocols method. ![]() This should only need to be used if the proxy server is not using the standard port number of 1080. In some cases sendmail will respond slowly after many NOOP commands; use of RSET avoids this sendmail issue. Instead, they should use the APIs defined by javax.mail package (and subpackages). Say for example applications should never construct instances of SMTPTransport directly. Instead, they should use the Session method getTransport to acquire an appropriate Transport object.
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