https://confluence.atlassian.com/kb/unable-to-connect-to-ssl-services-due-to-pkix-path-building-failed-error-779355358.html https://confluence.atlassian.com/kb/connecting-to-ssl-services-802171215.html https://confluence.atlassian.com/kb/how-to-import-a-public-ssl-certificate-into-a-jvm-867025849.html incoming mail secureimap openssl s_client -connect yourmailserver.ru:993 -servername yourmailserver.ru < /dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > public.crt