Follow steps in MOS Doc 231286.1 to configure WF in 11i for IMAP.
If your question is related to setting up IMAP on Solaris, pl post the question in the https://community.oracle.com/community/server_%26_storage_systems/solaris forums
Configuring the Oracle Workflow 2.6 Java-based Notification Mailer with Oracle Applications 11i (Doc ID 231286.1) -- applicable to R12
How to perform a meaningful SMTP telnet test to troubleshoot Java Mailer for sending email notifications (Doc ID 753845.1)
11i - 12 How To Troubleshoot Java-based Workflow Notification Mailer (Doc ID 242941.1)
Oracle Workflow FAQ (Doc ID 465887.1)
Thanks Hussein / Srini,
I am looking at the mailadmin Link. I will keep us posted on the outcome.
Just ensure that you are configure and using IMAP4 Compliant server.