Help with formatting a table in Powershell

Hello PowerShell Experts
I need a little help with formatting a table.  I have the following command that queries Exchange for mailboxes that received an email from a specific address.
$Mailboxes = get-messagetrackinglog –server ExchangeServer –sender nick@domain.com | `
where-object {$_.eventid –eq “deliver” }| select –expandproperty recipients

This produces the following list:
sales@xyz.com
accounting@xyz.com
finance@xyz.com

Now I want to find out who has access to these mailboxes, so I do the following:

$Mailboxes = get-messagetrackinglog –server ExchangeServer –sender nick@domain.com | `
where-object {$_.eventid –eq “deliver”} | select –expandproperty recipients

Foreach ($mailbox in $mailboxes) {
      Get-mailboxpermission $mailbox | select User
}

This gives me a list of users for each mailbox.  


I would like to create a table with this information.  The table would look like:

Mailbox                  User
sales@xyz.com            xyz\mary
sales@xyz.com            xyz\bob
sales@xyz.com            xyz\joe
accounting@xyz.com      xyz\sally
accounting@xyz.com      xyz\fred
finance@xyz.com            xyz\joe
finance@xyz.com            xyz\sally
finance@xyz.com            xyz\fred
finance@xyz.com            xyz\Eugene

My thoughts were something like this, but this isn’t working:

$Mailboxes = get-messagetrackinglog –server ExchangeServer –sender nick@domain.com | `
where-object {$_.eventid –eq “deliver”} | select –expandproperty recipients

Foreach ($mailbox in $mailboxes) {
      Get-mailboxpermission $mailbox | select `
@{n=”Mailbox”;e=”$mailbox”}
@{n=”Users”;e={$_.User}}
}
Any help with this would be greatly appreciated.

Thanks,
Nick