Duplicate of https://forums.bitfire.at/post/6487, please follow up there
Feature Request -- polling (pulling) contact photos from other services
Some services don’t automatically pull contact photos from other services (gmail, yahoo, gravatar, etc). I’d like to suggest a feature where DavX could check if there’s a contact photo associated with an email address (from one of these other services), and pull it in.
Options could be given to “never overwrite existing pictures, or Overwrite existing pictures”