Fetchmail does not check the certificate in the default configuration

[kaiyou]

Default fetchmail configuration does not enforce certificate checks when using TLS.

fetchmail: Server certificate verification error: unable to get local issuer certificate
fetchmail: Broken certification chain at: /C=US/O=Equifax/OU=Equifax Secure Certificate Authority
fetchmail: This could mean that the server did not provide the intermediate CA's certificate(s), which is nothing fetchmail could do anything about.  For details, please see the README.SSL-SERVER document that ships with fetchmail.
fetchmail: This could mean that the root CA's signing certificate is not in the trusted CA certificate location, or that c_rehash needs to be run on the certificate directory. For details, please see the documentation of --sslcertpath and --sslcertfile in the manual page.
fetchmail: Warning: the connection is insecure, continuing anyways. (Better use --sslcertck!)