... and WhatsApp and Instagram
Published May 2019
Published 2018-05-01, updated 2018-12-11
Free, open source tools to preserve privacy
Cf. rcarmo/imapbackup: A Python script for incremental backups of IMAP mailboxes
Installed at https://tcp.st/
"Send files through a safe, private, and encrypted link that automatically expires to ensure your stuff does not remain online forever." (ib., 2019-03-10)
"Generic Test for Unsolicited Bulk Email ... in a similar fashion to the EICAR anti-virus test file"