*openssl s_client -connect (mydomain.com):443 -servername (mydomain.com)*
CONNECTED(00000003) depth=2 C = GB, ST = Greater Manchester, L = Salford, O = COMODO CA Limited, CN = COMODO ECC Certification Authority verify error:num=20:unable to get local issuer certificate --- Certificate chain 0 s:/OU=Domain Control Validated/OU=PositiveSSL Multi-Domain/CN=sni74706.cloudflaressl.com i:/C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=COMODO ECC Domain Validation Secure Server CA 2 1 s:/C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=COMODO ECC Domain Validation Secure Server CA 2 i:/C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=COMODO ECC Certification Authority 2 s:/C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=COMODO ECC Certification Authority i:/C=SE/O=AddTrust AB/OU=AddTrust External TTP Network/CN=AddTrust External CA Root *(removing the begin certificate content) After the END certificate it continues with the following:* subject=/OU=Domain Control Validated/OU=PositiveSSL Multi-Domain/CN=sni74706.cloudflaressl.com issuer=/C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=COMODO ECC Domain Validation Secure Server CA 2 --- No client certificate CA names sent Peer signing digest: SHA512 Server Temp Key: ECDH, P-256, 256 bits --- SSL handshake has read 4141 bytes and written 450 bytes --- New, TLSv1/SSLv3, Cipher is ECDHE-ECDSA-AES128-GCM-SHA256 Server public key is 256 bit Secure Renegotiation IS supported Compression: NONE Expansion: NONE No ALPN negotiated SSL-Session: Protocol : TLSv1.2 Cipher : ECDHE-ECDSA-AES128-GCM-SHA256 Session-ID: 4284FEE486BBCDE1F754F8012FBFF519865D501EE7FFC8BEE7817A80F4FD0CD9 Session-ID-ctx: Master-Key: 03DC32DD1440B7D95E9AC427859660DC6F0F34C507A4C9EA10B67AE479E4FECC5C3C07478671E937BD50642E4CE3457D Key-Arg : None PSK identity: None PSK identity hint: None SRP username: None TLS session ticket lifetime hint: 64800 (seconds) TLS session ticket: 0000 - 5a b7 92 79 44 c6 8a 1a-62 ef 2e b1 5a 14 44 c4 Z..yD...b...Z.D. 0010 - 50 b3 e4 d0 ba 11 7b d1-a8 62 f9 50 0b 6d 06 ef P.....{..b.P.m.. 0020 - b7 cb 15 f0 ee 8b 4e 95-4f 9e bd ac ae 92 32 9e ......N.O.....2. 0030 - 48 ef 8b 92 b7 e7 3f e0-e1 39 b3 a3 0c 7c 72 a9 H.....?..9...|r. 0040 - 37 bc 2e bf d6 fc 4e 40-e5 cb 14 8e a1 22 a2 ff 7.....N@.....".. 0050 - dc 48 e4 6a 29 51 e9 21-f1 01 74 c5 f4 fc 2f 7e .H.j)Q.!..t.../~ 0060 - 6d dc 1c bd 97 9c df 4f-49 e1 15 63 5f 0f 82 54 m......OI..c_..T 0070 - 8e 51 6e dc fe c1 78 39-e9 33 a2 ca 05 5d 97 41 .Qn...x9.3...].A 0080 - 0a ce 89 5b 82 7c 36 3c-3c b2 57 17 05 9a a7 1a ...[.|6<<.W..... 0090 - d1 9c 05 bc 5e 4d 53 47-37 b9 ee a2 c1 b1 41 5b ....^MSG7.....A[ 00a0 - 1f bd 84 0d ce 44 53 ee-da 6f 6b eb a1 55 2c c8 .....DS..ok..U,. 00b0 - ec 8f 31 f1 90 f9 31 28-09 c3 08 2c 53 17 6d ed ..1...1(...,S.m. Start Time: 1490781136 Timeout : 300 (sec) Verify return code: 20 (unable to get local issuer certificate) --- closed ---------------- I've been playing with OpenSSL to try and locate the issue, and I think it has something to do with my certificate. I noticed the certificate was updated on the date this all went down hill, too. Do you think this has a possibility? -- View this message in context: http://postfix.1071664.n5.nabble.com/Postfix-cannot-start-tls-handshake-failure-tp89684p89726.html Sent from the Postfix Users mailing list archive at Nabble.com.