olFolderInbox returns incomplete result - powershell

Question

I'm trying to write a PowerShell script that automates the way to retrieve all my emails with sender information in outlook and importing it on a text file.
I monitored this script that I created returns incomplete results.
Below here is my code for:
$namespace = $Outlook.GetNameSpace("MAPI")
$inbox = $namespace.GetDefaultFolder([Microsoft.Office.Interop.Outlook.OlDefaultFolders]::olFolderInbox)
$emails = $inbox.items
ForEach ($email in $emails){
write-host $email.Subject
}

Answer 1

If "incomplete results" means that it's not returning all the emails you're expecting, there are a couple of things that I ran into when working with emails in Powershell:
It won't grab emails that are in folders under the Inbox. You have to call each folder separately. I had to setup a recusive loop to compile a list of them
Not all of your emails are actually stored in Outlook. By default, Outlook only pulls the last year of email form an email server. Sometimes it can show messages that exist on the server but they aren't actually downloaded.
EDIT: Here's the recursive function I built to get all the folders and subfolders within the Inbox.
# Create an ArrayList and immediately add the Inbox as the first folder in the list
[System.Collections.ArrayList] $folderList = #([PSCustomObject]#{
FolderPath = $inbox.FolderPath
EntryID = $inbox.EntryID
})
# Call the function to get all the folders and subfolders in the Inbox folder
Get-MailFolders $inbox.Folders
# Recusive function that will get all the folders and subfolders in the parent folder
function Get-MailFolders ($parent) {
foreach ($child in $parent) {
Write-Host "." -NoNewLine
$folderList.Add([PSCustomObject]#{
FolderPath = $child.FolderPath
EntryID = $child.EntryID
}) | Out-Null
Get-MailFolders ($child.Folders)
}
}

Answer 2

Continuing form my comment
Search for:
'PowerShell read outlook email name and subject'
hit(s)
https://devblogs.microsoft.com/scripting/use-powershell-to-data-mine-your-outlook-inbox
Read most recent e-mail from outlook using PowerShell
http://jon.glass/blog/reads-e-mail-with-powershell
olFolderInbox = 6
$outlook = new-object -com outlook.application;
$mapi = $outlook.GetNameSpace("MAPI");
$inbox = $mapi.GetDefaultFolder($olFolderInbox)
# Grab the specific properties from the messages in the Inbox:
$olFolderInbox = 6
$outlook = new-object -com outlook.application;
$mapi = $outlook.GetNameSpace("MAPI");
$inbox = $mapi.GetDefaultFolder($olFolderInbox)
$inbox.items|Select SenderEmailAddress,to,subject|Format-Table -AutoSize
# Results
<#
SenderEmailAddress To Subject
------------------ -- -------
notify#twitter.com Jonathan Glass Thomas Garnier (#mxatone) retweeted one...
mailing-list#rifftrax.com Riff Rediscover Puppets in our latest short!
notify#twitter.com Jonathan Glass [ Gunther ] (#Gunther_AR) retweeted one...
#>