The Email Library is a simple DLL which provides all the email functionality missing from MT4: multiple recipients, attached files, HTML formatting, support for GMail etc.
The Email Library is a DLL which developers can use to provide all the email functionality which is missing from MT4:
All mail transmission is asynchronous, and does not block the execution of the EA/indicator.
The Email Library caters for any number of scenarios which MT4's built-in email handling cannot cope with: