Below powershell helps to pull out all the  secondary email address for the given set of users

Get-Content C:\users.txt|Get-Mailbox | foreach {
for ($i=$_.EmailAddresses.Count;$i -ge 0; $i–)
{
$_.EmailAddresses[$i].ProxyAddressString

if ($_.EmailAddresses[$i].ProxyAddressString  -like “smtp:*” )
{
$_.EmailAddresses.RemoveAt($i)
}

}
$_|set-mailbox
}

Sending email throught command had multiple steps,  now Exchagne 2007 SP2 which works on Powershell V2 has introduced a new cmdlet Send-Mailmessage. Sending email with Send-MailEssage is just single line command Below is the example of the same

Send-MailMessage –From Krishna.k@domain.com –To Rajesh@domain.com –Subject “Send-MailMessage Test” –Body “Send-MailMessage Test”  -Attachments “c:\Attachment.txt” –SmtpServer Hubserver.domain

Powershell check can pull all the Exchange Services status runing on the exchange 2007 Servers

$Exchserver = “<Servername>”
$ExchServices = (gwmi -computer $Exchserver -query “select * from win32_service where Name like ‘MSExchange%’ or Name like ‘IIS%’ or Name like ‘SMTP%’ or Name like ‘POP%’ or Name like ‘W3SVC%'”)
$Services = @()
Foreach ($Service in $ExchServices){
$Service.Caption
$Service.Startname
$Service.StartMode
$Service.State
}

Powershell to check last window login time on all user accounts who has mailbox in Exchange Server. Below commands need to be executed on the Activel Roles cmd Shell. Its using Get-QADUser to find all the required details

Get-QADUser -IncludeAllProperties |?{($_.msexchhomeservername -ne $null) -and $_.LastLogonTimestamp -lt (get-date).AddDays(-30)} | select name,LastLogonTimestamp