[cryzed]

It was mentioned and shortly discussed a few pages back, but as of yet there's no real guide, no. To shortly sum it up: You preferably want to create a new e-mail account with Gmail (that's what I did), enable access for less secure apps in the account settings. Then update your e-mail in the fanfiction accounts you own to the newly created e-mail, and of course enable story alerts for stories which you want to keep up-to-date. Then in the FFDL settings you want to enter the following in the "Email Settings" tab:

IMAP Server Name: imap.googlemail.com
IMAP User Name: <your username>@gmail.com
IMAP User Password: <your password>

and press ok. If you do a bit of googling (regarding the less secure access in the Google account settings especially) it should be ok. But I'll see about creating a slightly more detailed guide at a later date.

Then, as soon as there are updates for a story, the fanfiction site it is hosted on should sent out an e-mail, which FFDL will recognize if you choose "Get Story URLs to Download from Email" from the dropdown menu.