Can we install PI Notifications 2016 on a server where Microsoft Messaging Queue is already being used by another application? If not, then if a notification generated is unsuccessfully posted to the SMTP server then will the PI Notifications retry?
Notifications 2016 does not interact with MSMQ, so installing it there should be fine.
If the contact's email endpoint is configured for retries, then yes the service will retry on failed sends.
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