UNCSA - In The Cloud - References
When experiencing Undeliverable Email Notices (aka: Bounce Backs) please complete the following steps:
Begin to enter the name of the individual/inbox you’d like to send an email to; once the name is displayed in the cached “recent sender” list, click the X to the right of the name.
This will remove the email address from your cached recent senders.
Once the cached address has been removed, you may click “Toâ€¦” to bring up the Global Address Book
Locate the individual/inbox you’d like to send to and double-click their name and click “Ok”
You may now compose and send your email as normal.