Error during Workflow Email delivery
In my production system we are using workflow, however some users are complaining that the emails do not reach them.
System ECC 6.0/AIX 5.3/Oracle 10.2.0.2
On checking the transaction SOST for that date, I found that it gives the error message as
" Cannot process message, no route from XXXXXXX to SID:YYYYY"
where XXXXXX - is the sender user id
YYYYY - is the receipient
NNN is the production Instance number
What could be the issue with this and how do I solve this problem.