I have generated a new certificate for my CentOS 6/postfix server, and it seems to work with most clients, but when I try to send email using tls from my Android device, it always fails. In my postfix log, I see: warning: TLS library problem: 13671:error:14094416:SSL routines:SSL3_READ_BYTES:sslv3 alert certificate unknown:s3_pkt.c:1275:SSL alert number 46: I get the same message when using the same new certificate with dovecot, so I don't think it is a postfix issue. To generate the certificate, I used the following commands: openssl genrsa -out MatthewsCA2017.key 2048 openssl genrsa -des3 -out MatthewsCA2017.key 2048 openssl req -x509 -new -nodes -key MatthewsCA2017.key -sha256 -days 3000 -out MatthewsCA2017.pem openssl genrsa -out smtp.matthews-family.org.uk.key 2048 openssl req -new -key smtp.matthews-family.org.uk.key -out smtp.matthews-family.org.uk.csr openssl x509 -req -in smtp.matthews-family.org.uk.csr -CA MatthewsCA2017.pem -CAkey MatthewsCA2017.key -CAcreateserial -out smtp.matthews-family.org.uk.crt -days 3000 -sha256 Any ideas on what might be wrong? Simon -- openssl-users mailing list To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users
