I have a similar problem. ~$ openssl s_client -connect imap.ufvjm.edu.br:993 CONNECTED(00000003) depth=2 C = IL, O = StartCom Ltd., OU = Secure Digital Certificate Signing, CN = StartCom Certification Authority verify error:num=19:self signed certificate in certificate chain --- Certificate chain 0 s:/C=BR/CN=imap.ufvjm.edu.br i:/C=IL/O=StartCom Ltd./OU=StartCom Certification Authority/CN=StartCom Class 1 DV Server CA 1 s:/C=IL/O=StartCom Ltd./OU=StartCom Certification Authority/CN=StartCom Class 1 DV Server CA i:/C=IL/O=StartCom Ltd./OU=Secure Digital Certificate Signing/CN=StartCom Certification Authority 2 s:/C=IL/O=StartCom Ltd./OU=Secure Digital Certificate Signing/CN=StartCom Certification Authority i:/C=IL/O=StartCom Ltd./OU=Secure Digital Certificate Signing/CN=StartCom Certification Authority --- Server certificate -----BEGIN CERTIFICATE----- snip -----END CERTIFICATE----- subject=/C=BR/CN=imap.ufvjm.edu.br issuer=/C=IL/O=StartCom Ltd./OU=StartCom Certification Authority/CN=StartCom Class 1 DV Server CA --- No client certificate CA names sent Peer signing digest: SHA512 Server Temp Key: ECDH, P-256, 256 bits --- SSL handshake has read 5723 bytes and written 326 bytes Verification error: self signed certificate in certificate chain
snip Start Time: 1496262567 Timeout : 7200 (sec) Verify return code: 19 (self signed certificate in certificate chain) Extended master secret: no offlineimap returns ERROR: Unknown SSL protocol connecting to host 'imap.ufvjm.edu.br' for repository 'XXXXX-Remote'. OpenSSL responded: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:661) Please, have you any clue here? Thankx! -- Marcelo
