Good morning 

how to use ftp to send large file on outlook 2010 without thirdparty .

thanks.

Hi,

Based on my knowledge, as long as you have a ftp server that you can upload files to, and the recipient has the permission to visit it, you can send the link of the file to the recipient in emails.

If you need a tool to automatic the steps, I haven't heard such a tool from Microsoft.

If there is any specific request about this that I didn't understand, please feel free to let me know.

Regards,

Melon Chen
TechNet Community Support