How can I change the setting in virtualmin so that I can send mail from my private IP?
I don't have a much experience with virtualmin myself, but I found this article which discusses how to set which IP address to send mail from in virtualmin
You can mention users to notify them: @username
You can use Markdown to format your question. For more examples see the Markdown Cheatsheet.
> I’m a blockquote.
I’m a blockquote.
[I'm a link] (https://www.google.com)
I'm a link
**I am bold** I am bold
*I am italicized* I am italicized