diff --git a/Dynv6.ps1 b/Dynv6.ps1
index 46882ea..b60610e 100644
--- a/Dynv6.ps1
+++ b/Dynv6.ps1
@@ -6,12 +6,12 @@
 # RESTful interface. Use the windows task schedualer to automatically run.
 #
 # Script Parameters:
-# -zone         <string>    DNS Zone (domain name) to update.
-# -token        <string>    HTTP Token, see: https://dynv6.com/keys#token
-# [-netmask]    <string>    Optional, IPv6 netmask, defaults to 128.
-# [-logfile]    <string>    Optional, filename to log to, defaults to "~/.dynv6.log".
-# [-ipv4]       <string>    Optional, IPv4 override, to skip resolving.
-# [-ipv6]       <string>    Optional, IPv6 override, to skip resolving.
+# -zone         <string>        DNS Zone (domain name) to update.
+# -token        <string>        HTTP Token, see: https://dynv6.com/keys#token
+# [-netmask]    <string>        Optional, IPv6 netmask, defaults to 128.
+# [-logFile]    <string|null>   Optional, filename to log to, defaults to "~/.dynv6.log", use null to disable logging.
+# [-ipv4]       <string>        Optional, IPv4 override, to skip resolving.
+# [-ipv6]       <string>        Optional, IPv6 override, to skip resolving.
 #
 ### Example
 # Run from CMD or Batch file to IPv4 and IPv6 with automatic lookup:
@@ -44,7 +44,7 @@ param(
     [string] $zone = $(throw "-zone is required"),
     [string] $token = $(throw "-token is required"),
     [string] $netmask = "128",
-    [string] $logfile = "$env:USERPROFILE\\.dynv6.log",
+    [object] $logFile = "$env:USERPROFILE\\.dynv6.log",
     [string] $ipv4 = "",
     [string] $ipv6 = ""
 )
@@ -71,7 +71,11 @@ $lookup6 = [System.Uri]'https://v6.ipinfo.io/ip'
 $update4 = [System.Uri]'https://dynv6.com/api/update'
 $update6 = [System.Uri]'https://dynv6.com/api/update'
 
-Get-Date | Tee-Object -FilePath $logfile -Append | Out-Host
+[string[]] $events = New-Object string[] 0
+
+if ($logFile) {
+    $events += Get-Date
+}
 
 # lookup IPv4, will be skipped if variable already set
 if ( ! $ipv4) {
@@ -86,16 +90,16 @@ $ipv6 = "$ipv6/$netmask"
 
 # update IPv4, if changed
 if ($old4 -eq $ipv4) {
-    Tee-Object -FilePath $logfile -Append -InputObject "IPv4 address unchanged" | Out-Host
+    $events += "IPv4 address unchanged"
 } else {
     # send IPv4 address to dynv6
-    Tee-Object -FilePath $logfile -Append -InputObject "Updating IPv4" | Out-Host
+    $events += "Updating IPv4"
     $body = @{
        zone = $zone
        token = $token
        ipv4 = $ipv4
     }
-    Invoke-RestMethod -Method Get -Uri $update4 -Body $body | Tee-Object -FilePath $logfile -Append | Out-Host
+    $events += Invoke-RestMethod -Method Get -Uri $update4 -Body $body
 
     # save current IPv4 address
     Out-File -FilePath $file4 -InputObject $ipv4
@@ -103,18 +107,23 @@ if ($old4 -eq $ipv4) {
 
 # update IPv6, if changed
 if ($old6 -eq $ipv6) {
-    Tee-Object -FilePath $logfile -Append -InputObject "IPv6 address unchanged" | Out-Host
+    $events += "IPv6 address unchanged"
 } else {
     # send IPv6 address to dynv6
-    Tee-Object -FilePath $logfile -Append -InputObject "Updating IPv6" | Out-Host
+    $events += "Updating IPv6"
     $body = @{
        zone = $zone
        token = $token
        ipv6 = $ipv6
     }
-    Invoke-RestMethod -Method Get -Uri $update6 -Body $body | Tee-Object -FilePath $logfile -Append | Out-Host
+    $events += Invoke-RestMethod -Method Get -Uri $update6 -Body $body
 
     # save current IPv6 address
     Out-File -FilePath $file6 -InputObject $ipv6
 }
 
+if ($logFile) {
+    Out-File -FilePath $logFile -Append -InputObject ($events -join "`n")
+}
+echo ($events -join "`n")
+