I use claws-mail in the last 6 months on an windows-pc (Claws-mail version 3.8.1 und now 3.10.1) and on an raspberri pi under rasbian (claws-mail version 3.8.1) as a test.
For 3 or 4 days I can't read mails from a POP3-server by the provider STRATO.DE, both on the windows-pc and on the raspi. The port used for POP3 is 995.
It's only the error message "*** SSL handshake failed".
Sending mails with claws-mail by the SMTP-server is OK.
Reading mails with claws-mail from the POP3-server by the provider T-ONLINE.DE make not problems.
My primary mail client is on my windows-pc a old eudora-installation. Under eudora all POP3-server (t-online and strato) works without problems.
It's a problem from claws-mail for me.
How can I solve this problem?
(Please excuse my catastrophic english)
That is probably caused by the provider disabling SSLv3 (in response to POODLE vulnerability), and Claws Mail 3.10.1 not being able to handle it. This has been fixed in 3.12.0.
Feel free to reopen if the problem persists with 3.12.0.