Closed as user error.
In 8.5.3 client, when sending emails to multiple groups and some of those groups contain duplicate email addresses, the duplicates will be stripped out. Example: Group1 contains John and Jane Group2 contains Jane address To: Group1,Group2 Checking the sent message shows it only went to Group1. Group2 was stripped before the message was delivered to the server. This behaviour is different than the 8.0.x client.
Workaround: append the "@domain" to the group name in the To field.
This APAR is associated with SPR# JSTN96NNBS. The problem was caused by a user error or user misunderstanding.
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APAR is sysrouted FROM one or more of the following:
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