smtpserver | A SMTP server component for .NET Framework and .NET Core | Proxy library

After a while, I tried a while more and I've found the solution.

This part is not working

It is being sent as an attachment due to the flag -Attachments. What i would do is remove this bit of code | Out-File "C:\APPS\Delete Folder - Cory\CoryHtmlReport.html" and just pass the $CoryReportHtml variable as body and try it out that way

Ok, I have revised your code and added a few comments in it to hopefully point out what was wrong in your code.

As I have gathered from your previous questions, you want to also report the files with 'wrong' filenames (i.e. not containing either 'Group-EIP', 'Retail-EIP' or 'UAT').
When you add parameter -Include '*Group-EIP*', '*Retail-EIP*','*UAT*' to the Get-ChildItem cmdlet, all files with a bad name will not even make it into the ForEach loop, and you won't be able to log them as "Error: Incorrect filename", so remove that.

Next, the output of all this is a structured CSV file and at one point you added Add-Content -Path $LogFile -Force in the code, which will destroy the structure and make the CSV unusable.

You have added a Send-MailMessage call inside the loop, and by doing that, the code would send an email on every file it processes. I have moved that towards the end of the code, so it will only send one single email.
For demo, I added the resulting CSV file as attachment in this email, but you can also create a nice HTML table of whatever you collected in $result.
I'll leave that up to you, but there are plenty examples to be found here at StackOverflow.

a possible solution: the regex pattern looks at 3 consecutives lines

Try changing port to 587. Also your smtpServer don't looks right for gmail.

Use the local_hostname argument to smtplib.SMTP() to override the default hostname.

IoT Hub will not accept the JSON in this form, because using the value true and adding it to a string will convert it to True (notice the upper case T). This is not a valid value for the JSON parser. Make sure the value you send is lower case.

While that will fix the exception, and fix your problem (IoT Hub will accept this text just fine), this is still not valid JSON. All the properties and string values should be surrounded by double-quotes. You want your JSON to end up looking like this:

You can upload your images to any web server and add an URL to the uploaded image. But this way doesn't guarantee that images will be displayed in Outlook on the recipient's side because Outlook prevents such images from loading by default.

The most reliable way is to attach images to the mail item and then add the CID attribute to them. In the message body you can refer to such images by using the CID attribute set on the attachments. Read more about that in the Embed Images in New Messages using a Macro article.