How can I add a senders email address automatically to my contacts.

Hello, unfortunately it is not possible to add all senders into your contact list, however you can import a sender’s email address into your contact by hovering over the sender’s id and selecting the option “add to contacts” in the bubble. You can also add all your recipients to your Contacts using the cached recipients in your eM Client.  Navigate to Tools > Settings > Mail > Compose and select “Show recipients” to view your cached contacts.

Select all and right click the selection to import into your contacts folder.

Hope this helps,