Some users are sending messages to local groupwise addresses in a format:
User Name <firstname.lastname@example.org>
These messages are never delivered. Properties of such messages show Transfer Delayed, Post Office is shown like domain.com>
GWIA log shows:
E75F DMN: MSG 7063553 Send Failure: 451 Temporary local problem - please try later
We have a lot of cases like this due to GroupWise Data Synchronizer server, because all messages coming from mobile users showing From address in this format (User Name <email@example.com>). And replies to such messages are never delivered.