The opening page on DeltaNet says, in part:
The DeltaNet Employee portal ("DeltaNet") provides secure access to information and business-related processes for Delta employees, retirees and other select individuals. Unauthorized users are not approved for entry.
You must not copy, reproduce or forward any content from DeltaNet outside of Delta Air Lines
, including posting on any personal or public Web pages, blogs, or social media sites, including, but not limited to Flyertalk, Facebook, or Twitter.
By logging on to DeltaNet, you understand and agree that select content is available for authorized individuals through DeltaNet. Data that is not yet published in DeltaNet, or has not been authorized for remote access, will not be available when accessing DeltaNet remotely using Delta's Extranet."
Seems pretty clear to me.
If, as you say, others have done it in the past, you should have no problem.
[Edited 2014-01-08 19:43:45]