Task Send Mail - Not sending E-mails from SAP

[manoj-rajan]

initiator to the E-Mail step.The Workflow log says that the mail has been
sent and I receive it in the SAP Inbox after a few minutes. Does anybody
know the reason for the delay?
Setup Done:
- I set up SU02, and assigned e-mail ID for WF_BATCH and the Intiating User,
defaulting internet as the communication method to use.
 
On troubleshooting I found the following :
- The sending of the mail from a simple SWBP 'New Message' button works
great, and there is an entry in SOST.
> From this I am concluding that the SMTP set must be fine. So the problem
lies somewhere in resolving the SAP UserID to   Email.
- Workflow does not show any errors and completes successfully.
- I tried passing different receiver types and did not have any luck.
 
 Is there any log to look at besides SOST? Does anybody have any ideas to
solve this ?
 
Manoj