You should whitelist delivery@p2k.co in your Kindle account to be able to receive deliveries. This was already explained in setup steps when you created your first delivery. If you skipped this step for some reason, click here to go to your Amazon Kindle account and whitelist delivery@p2k.co.
You cannot change delivery email for an existing delivery. When you create a new delivery (delete the old one if you wish), you will have an option to change your delivery email on the popup that comes before the last step.
You cannot send all your articles with a single delivery because Amazon puts 25MB limit on deliveries, so we cannot bypass that. 20 article limit is put to ensure you receive your deliveries reliably. Multiple recurring deliveries can help you do this easily. If you want all articles in your Kindle right now, you will need to create multiple onetime deliveries. Signing up for a premium/platinum account can speed this up for you and ensure you receive all of your deliveries right away.
To delete your articles from your library completely (not only from your device) you can go to Amazon CloudDrive and after logging in, you can select My Send to Kindle Docs and you will be able to see all your P2K deliveries there. You can delete them from there and they won't show up in your library. P2K does not provide Kindle support, if these instructions don't work for your device, then please contact Amazon.
Simply go to your Kindle settings and open Settings tab. Then go to section "Personal Document Archiving" and turn archiving off.
