In case you have a kindle device, I have a script written for sending files to your kindle account, so that they are sent back to your device after conversion.
This needs you to have a gmail account and that account added to Kindle account.
This works from terminal. So, it saves you from attaching all files to an email via your mail interface (be it any MUA or web browser).
It can be run as
python pykindle.py provided you have written all your account information in ~/.pykindle.cfg
# gmail_user =
# gmail_password =
# attach_dir =
# kindle_user =
File is here.