When I try "posttls-finger dane.sys4.de" I get the following. I have emphasized a couple of areas in the following text that cause me some concern.
posttls-finger: Connected to dane.sys4.de[194.126.158.134]:25 posttls-finger: < 220 dane.sys4.de ESMTP Postfix posttls-finger: > EHLO smtp.klam.ca posttls-finger: < 250-dane.sys4.de posttls-finger: < 250-PIPELINING posttls-finger: < 250-SIZE 10240000 posttls-finger: < 250-ETRN posttls-finger: < 250-STARTTLS posttls-finger: < 250-ENHANCEDSTATUSCODES posttls-finger: < 250-8BITMIME posttls-finger: < 250 DSN posttls-finger: > STARTTLS posttls-finger: < 220 2.0.0 Ready to start TLS posttls-finger: dane.sys4.de[194.126.158.134]:25: Matched subjectAltName: dane.sys4.de posttls-finger: dane.sys4.de[194.126.158.134]:25: subjectAltName: sys4.de posttls-finger: dane.sys4.de[194.126.158.134]:25 CommonName dane.sys4.de posttls-finger:*certificate verification failed* for dane.sys4.de[194.126.158.134]:25: untrusted issuer /C=IL/O=StartCom Ltd./OU=Secure Digital Certificate Signing/CN=StartCom Certification Authority posttls-finger: dane.sys4.de[194.126.158.134]:25: subject_CN=dane.sys4.de, issuer_CN=StartCom Class 2 Primary Intermediate Server CA, fingerprint=41:B5:70:D5:35:68:72:B2:64:4C:5E:DE:74:52:23:E1:3B:3A:03:07, pkey_fingerprint=E5:CD:96:DD:35:8C:91:30:75:5B:D0:66:47:1D:CD:83:39:9A:D5:CC posttls-finger:*Untrusted TLS connection *established to dane.sys4.de[194.126.158.134]:25: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits) posttls-finger: > EHLO smtp.klam.ca posttls-finger: < 250-dane.sys4.de posttls-finger: < 250-PIPELINING posttls-finger: < 250-SIZE 10240000 posttls-finger: < 250-ETRN posttls-finger: < 250-ENHANCEDSTATUSCODES posttls-finger: < 250-8BITMIME posttls-finger: < 250 DSN posttls-finger: > QUIT posttls-finger: < 221 2.0.0 Bye
Certificate verification fails and I wind up with an untrusted connection. Is this something I did or is there a real problem?
John A