Does anyone know where the alerts for "Desktop Central Server Start up Failure" come from or are set?

At the moment we have one old employee getting the alert and one who isn't an admin getting it.

I checked in Admin - Server settings and the notifications settings point to an admin directly.

So i am guessing there is another alerting feature that isn't dynamic since it's going to an old employee long gone.

Header info doesnt have much to go one but are there other suggestions?

Remote Server returned '550 5.1.10 RESOLVER.ADR.RecipientNotFound; Recipient not found by SMTP address lookup'

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 May 2019 00:07:36 -0600

Date: Fri, 3 May 2019 00:07:35 -0600

From: <help desk email>

To: <email of dude long gone>

Message-ID: <693914538.2.1556863656291.JavaMail.dcserver$@dcserver>

Subject: Desktop Central Server Start up Failure!

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