Quick little query to find what Alerts in SolarWinds email to an email address. This can be used SolarWinds DB Manager. 

SELECT

    ac.Name AS AlertName,

    ac.Enabled As Alert_Enabled,

    ap.PropertyName AS Property,

    ap.PropertyValue AS PropertyValue

FROM

    [dbo].AlertConfigurations ac

INNER JOIN

    [dbo].ActionsAssignments aa ON ac.AlertID = aa.ParentID

INNER JOIN

    [dbo].ActionsProperties ap ON aa.ActionAssignmentID = ap.ActionID

WHERE

    ap.PropertyValue Like '%<email minus domain>%'