Incoming email stuck in SOIN and Internal recipient Blank

Hi experts,

ERMS solution hsa been implemented in CRM 7.0 And I configured a new recipient in CRMC_IC_AUIADDR and SO28 transaction.

For some senders only,The internal recipients is always blank in SOIN transaction.Hence its not reaching agent inbox.

Actually incoming new emails are visible in SOIN without internal recipient tagged ,which is supposed to be tagged according to SO28 new recipient entry.But if i send them again from SOIN, the internal recipient is getting tagged and mail reaches to agent inbox.

I couldnt figure out why this not working for new recipient only and existing set up is working fine.

Did i miss any config settings? is there any SAP standard jobs to schedule to process the missing internal recipeint mails from SOIN

Kindly provide your inputs.

Thanks in advance.

Regards

Shan