I use Offlineimap to download mails from various accounts to my machine where. After my last Debian upgrade, when running
offlineimap, I got the following error for one of my accounts:
Establishing connection to imap.redacted.ch:993 (redacted-Remote) ERROR: Unknown SSL protocol connecting to host 'imap.redacted.ch' for repository 'redacted-Remote'. OpenSSL responded: [SSL: DH_KEY_TOO_SMALL] dh key too small (_ssl.c:727) *** Finished account 'redacted' in 0:00 ERROR: Exceptions occurred during the run!
If you have the following error, let me save you some time with your favorite search engine: The reason is that "newer" versions of OpenSSL fend of a TLS attack called FREAK (Factoring RSA Export...