To check the SSL connection I tried
Code:
openssl s_client -connect imap.gmail.com:993
This gives me
Code:
...
Verify return code: 20 (unable to get local issuer certificate)
...
I downloaded the OWB ca-bundle.crt and tried
Code:
Verify return code: 0 (ok)
So using this bundle could be the solution, but I also don't know how to install this bundle. According to
http://www.warp1337.com/content/adding-additional-ssl-certificate-default-ca-bundle-ssl-certificate-chain-verification-ca
it should also be possible to install all certificates by hand in the format <hexnumber>.0 in the amissl:certs directory. The above commands gave me also
Code:
Certificate chain
0 s:/C=US/ST=California/L=Mountain View/O=Google Inc/CN=imap.gmail.com
i:/C=US/O=Google Inc/CN=Google Internet Authority G2
1 s:/C=US/O=Google Inc/CN=Google Internet Authority G2
i:/C=US/O=GeoTrust Inc./CN=GeoTrust Global CA
2 s:/C=US/O=GeoTrust Inc./CN=GeoTrust Global CA
i:/C=US/O=Equifax/OU=Equifax Secure Certificate Authority
I found the cert for GeoTrust Global CA but not Equifax Secure Certificate Authority.