If you are a SEH user, you may login here:

Login
Avoid having to verify your email address,
and drop-off files to non-SEH users.
 

Anyone may perform the following activities:

Drop-off
Drop-off (upload) a file for a SEH user (email verification required).
Pick-up
Pick-up (download) a file dropped off for you.
 
SEH users: you may login with your username and password and send files to anyone, in or out of SEH.
Non-SEH users: you cannot log in, but can still send files to SEH users if you know their email address. Start by clicking the "Drop-off" button.
SEH users who wish someone outside SEH to send them files, can make it a lot easier for them by logging in and clicking "Request a Drop-off". That saves the other person having to prove who they are. The request created will be valid for 7 days.
 
ZendTo is a service to make it easy for you to move files, including large files up to 20.0 GB, in and out of SEH.
 
How secure is ZendTo?

Files are automatically deleted from ZendTo 14 days after you upload them.