Hi All Courier-imap using Let's Encrypt certificates work fine with OpenSSL v1.x But the problem occurred after upgrade OpenSSL v3.0 in last year. This month upgrade OpenSSL v3.5 still. The Let's Encrypt certificates work fine with other server like Postfix, Apache and vsftpd in same all condition.
After Google. I had been check Thread: [courier-users] Problems connecting to imap after upgrade of openssl to v3 <https://sourceforge.net/p/courier/mailman/courier-users/thread/CAMO9ifvubdC6uQ60FRdB3a7-akyc%2BwDSyEtc02yv7OHpao64_Q%40mail.gmail.com/#msg45940453> and follows How do I configure OpenSSL to allow the use of legacy cryptographic algorithms <https://help.heroku.com/88GYDTB2/how-do-i-configure-openssl-to-allow-the-use-of-legacy-cryptographic-algorithms> Talking about fixed by OpenSSL v3.5 support legacy cryptographic algorithms I'm follows to config openssl.cnf and result as follows # openssl list -providers Providers: default name: OpenSSL Default Provider version: 3.5.5 status: active legacy name: OpenSSL Legacy Provider version: 3.5.5 status: active But problem still... I would be grateful if all could help me debug. -- Regards, Wei-Jen Chang
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