This update for claws-mail fixes the following issues:
- Update to 3.17.6: * It is now possible to 'Inherit Folder properties and processing rules from parent folder' when creating new folders with the move message and copy message dialogues. * A Phishing warning is now shown when copying a phishing URL, (in addition to clicking a phishing URL). * The progress window when importing an mbox file is now more responsive. * A warning dialogue is shown if the selected privacy system is 'None' and automatic signing amd/or encrypting is enabled. * Python plugin: pkgconfig is now used to check for python2. This enables the Python plugin (which uses python2) to be built on newer systems which have both python2 and python3. - CVE-2020-15917: Fixed an improper handling of suffix data after STARTTLS is mishandled (boo#1174457).