Privacy issue - Mailspring leaking image data in email replies

Description

I use www.emailprivacytester.com to check on data being leaked by email providers & clients. Mailspring doesn’t leak anything while reading (only if loading remote images, but that all email clients seem to). But mailspring does leak image data as soon as you click on reply (see screenshot) - even if you haven’t sent the email. It happens with all email accounts & does not happen in Apple Mail or Thunderbird.

Screenshots

Setup

  • OS and Version: Mac OS 10.15.6
  • Mailspring Version: Mailspring 1.7.8

(Originally posted by paksj on GitHub.)

(Original post had 2 upvotes.)