Free StartSSL certificate not trusted

Hi all, I have installed an ubuntu server with dovecot and a free certificate from startssl, but I get: verify error:num=20:unable to get local issuer certificate and verify error:num=21:unable to verify the first certificate Any idea why? Tanks in advance, Allan My dovecot conf: --- auth_userna

Free StartSSL certificate not trusted

Hi all, I have installed an ubuntu server with dovecot and a free certificate from startssl, but I get: verify error:num=20:unable to get local issuer certificate and verify error:num=21:unable to verify the first certificate Any idea why? Tanks in advance, Allan My dovecot conf: --- auth_userna