If an error occurs while an Encyclopedia volume is sending an e-mail notice request to a cluster node, the volume writes an error message to its diagnostic log.

If a cluster node receiving a request to send an e‑mail notice encounters an error, the node writes an error message to its diagnostic log. For example, when the combined size of the message text and the attachment exceeds the maximum message size, iHub does not send the e-mail. The diagnostic log in AC_DATA_HOME/server/log describes failed e‑mail notification attempts.