If you use correct certificates with correct postfix dovecot configuration
you must be able to do peer verification.
If you are not able to do it, you don't have right certificates or right
configuration.
The wrong config may resides in both postfix/dovecot files or in the
roundcube itself.
Thunderbird ignore peer verification on both IMAP and SMTP.
Bye
In data 11 agosto 2017 00:24:52 Ralph Seichter
<m16+roundc...@monksofcool.net> ha scritto:
On 11.08.17 00:00, Davide Perini wrote:
I'm pretty sure that the problem resides in your postfix/dovecot
configuration, if you use those.
Sorry, but no. As I stated in my OP, other clients can access Dovecot
and Postfix just fine (tested with iOS Mail, Apple Mail, Thunderbird on
macOS and Windows). Roundcube 1.3 with PHP 5.6 is the only combination
causing problems, and since Roundcube uses PHP to establish IMAP
connections and I can connect fine if I disable PHP peer verification,
the cause is definitely that verification mechanism failing on my
Roundcube server. The crux is to figure out why it fails.
Google confirms that other people experienced similar problems after
updating to PHP 5.6, which enabled peer verification as a default
setting (see http://php.net/manual/en/migration56.openssl.php).
-Ralph
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