java.lang.IllegalArgumentException

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  • java.lang.IllegalArgumentException: object is not an instance of declaring class at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1227) at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:322) at javax.mail.Service.connect(Service.java:236) at javax.mail.Service.connect(Service.java:137)
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