I am facing this issue in cognos 8.4 , my reports are not sent to all the receipient mail id's , but only some are getting the reports , i don't see any error in the history , i can see the message as report delivered to all the mail id's , i have checked the error log but no error either there, i have pinged the mail server from cognos , there is no issue with it , can anyone help me regarding this issue
Thanks in Advance.
If you are sending to Groups (Distribution Lists), please check if groups are allowed in AD to receive system generated emails. This happened to us as well back in 2011 :)