Just curious.

1. You are writing a post.
2. The post take too long to get written.
3. You submit your post.
4. System notifies that the session has expired
5. You have to do login again.
5. You are given the option to send again your post without any lost.

Is this feature a custom made for DAW, an option of vBulletin or maybe a plugin?

I am thinking in the auto save content option, but it seems that this is just a way to manually recover a text that you were writing, no something automatic when you do login again.