Getting WF error like below
:10.28.201.111:-11:20420:SYSADMIN(0)Thread[outboundThreadGroup1,5,outboundThreadGroup]:1141089706:2660:1438001599792:17:UNEXPECTED:[SVC-GSM-WFMLRSVC-123430-10006 : oracle.apps.fnd.wf.mailer.SMTPOutboundProcessor.open()]:Unable to connect to tranport
Can anyone hwlp on this what might be cause of this issue and how to resolve