Enterprise Vault Domino Journal Archiving will capture a 41206 error for each message found with an invalid SMTP address on each pass of the Journal Mailbox by the Domino Journal Archiving Task.
Source: Enterprise Vault
Event ID: 41206
Task Category: Lotus Domino Journaling Task
Description: There was an error processing an item in a database. The task will process the item again on the next archiving run.
Trace: at KVS.EnterpriseVault.LotusDomino.SMTPBoundary.IsInternalAddress(String address)
When the registry value 'InternalSMTPDomains' is set at the 'Agents' key level and a message from the Journal Mailbox is examined to determine whether or not an address is internal or external; this error will occur when there is an invalid SMTP address present in the address list of one or more e-mails attempting to be Archived from the Domino Journal Mailboxes.
One example of an invalid SMTP address format that is known to cause this error is when a space exists between the @ and the domain:
This issue has been addressed as part of the following release:
Enterprise Vault 9.0.4 - Release Details
Enterprise Vault 10.0.2 - Release Details