Emails filtered eventlogs from previous 24 hours

MailEventLogs.ps1

# powershell.exe -NonInteractive -NoProfile -ExecutionPolicy Unrestricted -Command "& { .\MailEventLogs.ps1 }"

$mailTo = "foo@example.com"
$mailFrom = "$env:COMPUTERNAME@example.com"
$smtpServer = "aspmx.l.google.com"

Set-StrictMode -Version Latest

$startDate = (Get-Date).AddDays(-1).AddMinutes(-5)

$ignore = @{
    'Schannel' = 36888, 36887, 36874;
    'TermDD' = 50;
    'MSSQL$SQLEXPRESS' = 18456, 17806, 18452;
    'Microsoft-Windows-Security-Auditing' = 4625;
    'Software Protection Platform Service' = 902, 903;
    'Microsoft-Windows-User Profiles Service' = -1;
    'New Relic .NET Profiler' = 256, 257;
    'ASP.NET *' = 1309;
    '.NET Runtime' = 1022; # "Loading profiler failed" fails for SQL Server localdb
    'Microsoft-Windows-HttpEvent' = 15300, 15301; # "SSL Certificate Settings created/deleted for Port"
}

$log = 
"Application","System","Security" | foreach { 
    $logname = $_
    $entries = Get-WinEvent -FilterHashtable @{LogName=$logname; StartTime=$startDate; Level=2,3} -ErrorAction silentlycontinue | where { 
        $eventsource = $_.ProviderName
        $eventids = $ignore.GetEnumerator() | where { $eventsource -like $_.Name } | foreach { $_.Value }
        -not ($eventids -contains $_.Id -or $eventids -eq -1)
    }
            
    if ($entries) {
        "`n## $($logname) ##`n"
        $entries | foreach { 
            $message = $_.FormatDescription()
            if ($message -eq $NULL) {
                $message = [string]::Join("`r`n", ( $_.Properties | foreach {$_.Value}) )
            }
            "  $($_.TimeCreated.ToString('yyyy-MM-dd HH:mm:ss')) $($_.ProviderName.Trim()) $($_.UserId) [$($_.LevelDisplayName)] $($_.Id): $message `r`n-----------------------"
        }
    }
} 

if ($log) {
    
    $body = ($log | Out-String)
        
    if ($body.Length -gt 100000) { # 100K

        $attachment = "$env:TEMP\EventLog.txt"
        $body | Out-File $attachment -Encoding "UTF8"
        $body = "See attached..."
        
        "Sending message as attachment"
        Send-MailMessage -To $mailTo `
                            -From $mailFrom `
                            -Subject "EventLog: $env:COMPUTERNAME" `
                            -SmtpServer $smtpServer `
                            -Body $body -Attachments $attachment
    }
    else {
        "Sending message"
        Send-MailMessage -To $mailTo `
                           -From $mailFrom `
                           -Subject "EventLog: $env:COMPUTERNAME" `
                           -SmtpServer $smtpServer `
                           -Body $body    
    }
}
else {
    "Nothing to do"
}