Hi theurlm
Oh! I'm sorry missed, add follows
OS: FreeBSD 15.0-RELEASE
Courier-imap: v5.3.2
OpenSSL: v3.5.5
imapd-ssl: (Comment removed)
IMAPDSTARTTLS=NO
IMAP_TLS_REQUIRED=1
COURIERTLS=/usr/local/bin/couriertls
TLS_PROTOCOL=TLSv1.2+
TLS_CIPHER_LIST="TLSv1.3+ECDH:TLSv1.2+ECDH@STRENGTH"
TLS_STARTTLS_PROTOCOL="$TLS_PROTOCOL"
TLS_CERTFILE=/usr/local/etc/courier-imap/certificate/fullchain.pem
TLS_PRIVATE_KEYFILE=/usr/local/etc/courier-imap/certificate/privkey.pem
TLS_VERIFYPEER=PEER
TLS_CACHEFILE=/usr/local/var/couriersslimapcache
TLS_CACHESIZE=524288
TLS_ALPN=imap
MAILDIRPATH=.Maildir
Thank you very much.
theurlm <[email protected]> 於 2026年3月13日週五 下午5:09寫道：
> Hi Chang,
>
> which courier version and linux system are you using ?
>
> i run a Alma linux 9 with openssl 3.5.1 courier 1.6 and have no issue.
>
> maybe you could show us as well the imapd-ssl config ?
>
> cheers
>
> Michael
>
>
> On Fri, 2026-03-13 at 16:07 +0800, Neko Chang wrote:
> > 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 and follows 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
> > _______________________________________________
> > Courier-imap mailing list
> > [email protected]
> > Unsubscribe:
> > https://lists.sourceforge.net/lists/listinfo/courier-imap
>
>
>
> _______________________________________________
> Courier-imap mailing list
> [email protected]
> Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-imap
>
--
Regards,
Wei-Jen Chang
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