Could not connect to SMTP host: undefined, port: 25;

_PDL=TEST&_TKN=AP150&_EVT=CHG&_RTN=DATA&_LFN=ALL&_TDS=IGNORE&FC=C&ADDENDA-OPTION=N&CURRENCY-OPT=I&DISC-OPTION=N&JOB-NAME=myjob&PAY-GROUP=mgroup&PAY-INV-IMMED=N&PAY-THRU-DATE=20170211&PAYMENT-CODE=CHK&PAYMENT-DATE=20170211&PRINT-VOUCHER=N&RECONCILE-ADV-EXP=N&REPORT-SEQ=N&SEL-CASH-CODE=101&SPEC-HANDLING=N&UPDATE-OPTION=Y&USER-NAME=myuser&VOUCHER-NBR-FLAG=N&_DELIM=%09&_OUT=XML&_EOT=TRUE

Renders the error:
Activity failed: UpdateEMP
S3 Transaction UpdateEMP: AGS Error no message
javax.mail.MessagingException: Could not connect to SMTP host: undefined, port: 25;
nested exception is:
java.net.ConnectException: Connection refused: connect
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1961)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654)
at javax.mail.Service.connect(Service.java:295)
at javax.mail.Service.connect(Service.java:176)
at com.lawson.bpm.processflow.utility.PFlowUtils.sendMail(PFlowUtils.java:166)
at com.lawson.bpm.processflow.workFlow.flowGraph.FgActivity.handleActivityError(FgActivity.java:762)
at com.lawson.bpm.processflow.workFlow.flowGraph.FgaAgs.startActivity(FgaAgs.java:334)
at com.lawson.bpm.processflow.workFlow.flowGraph.FgActivity.execute(FgActivity.java:946)
at com.lawson.bpm.processflow.workFlow.flowGraph.FgProcess.run(FgProcess.java:2195)
at com.lawson.bpm.designer.runtime.LocalFlowRunner.run(Unknown Source)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:319)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:237)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1927)
... 10 more


Error encountered executing process

any thoughts, folks?