Call a Group Object by Name in ForEach Loop - arrays

Question

I've imported a CSV file into an array and grouped it by email address. I'd like to be able to call the group by name in another ForEach loop so that I can send an email to each email address with a table of the $ServerID(s) and $DateTime(s) associated with them. Was Group-Object the best way to start this?
In the CSV file, one email address can be associated with many servers, but one server is only associated with one email address. The values in the file will be updated constantly - thus the need for dynamic variables for almost all objects.
$csv = import-csv "C:Example.csv"
$array = #()
ForEach ($server in $csv) {
$object = New-Object PSObject -Property #{"Email"= $server.Email; "ServerID" = $server.ServerID; "DateTime" = $server.DateTime}
$array += $object}
$array | Group-Object Email
Count Name Group
2 A#gmail.com {#{PG_Email=A#gmail.com; ServerID=333; Lease_End=10/10/15}, #{PG_Email=A#gmail.com; ServerID=111; Lease_End=12/12/15}}
1 B#gmail.com {#{PG_Email=B#gmail.com; ServerID=222; Lease_End=09/09/15}}

Answer 1

Yes, you should use Group-Object. I'm not sure what you mean with "call the group by name". If you want to select a group based by the name you would have to save the result from Group-Object and search for your group like:
$groups = $array | Group-Object Email
$selectedmail = "B#gmail.com"
$groups | Where-Object { $_.Name -eq $selectedmail }
Or you could save the groups in a hashtable:
#Create hashtable
$ht = #{}
#Fill hashtable with groups (email as key/ID)
$array | Group-Object Email | ForEach-Object { $ht[$_.Name] = $_.Group }
$selectedmail = "B#gmail.com"
#Get objects for selected mail
$ht[$selectedmail]
If you are going to mail everyone, I would simplify this to:
Import-Csv "C:\Example.csv" |
Group-Object Email |
ForEach-Object {
$to = $_.Name
#Get table of ServerID + Lease_End as string to send as mailbody
$mailbody = $_.Group | Format-Table -Property ServerID, Lease_End -AutoSize | Out-String
#You could also create a HTML-table with:
$htmlbody = $_.Group | Select-Object -Property ServerID, Lease_End | ConvertTo-HTML -Property Name, Length
#Send mail
#Send-MailMessage -To $to -Subject "Lease-status" -Body $mailbody -From "mysupersecret#mail.com"
}