I'm in the process of setting up TLS on a number of servers. I have two servers, both running Postfix, one an smtp client and the other an smtpd server, using a self-signed SSL certificate.
Sending messages, I get the following in the log on the sender: Nov 19 10:05:01 mailr postfix/smtp[22688]: setting up TLS connection to mail.linux-corner.info Nov 19 16:05:01 mailr postfix/smtp[22688]: TLS connection established to mail.linux-corner.info: TLSv1 with cipher ADH-AES256-SHA (256/256 bits) However, the same server sending to another TLS-enabled server (I believe its qmail), I get this: Nov 19 10:09:09 mailr postfix/smtp[25134]: setting up TLS connection to burn.qinetiq.com Nov 19 10:09:09 mailr postfix/smtp[25134]: certificate verification failed for burn.qinetiq.com: num=18:self signed certificate Nov 19 10:09:09 mailr postfix/smtp[25134]: Unverified: subject_CN=burn.qinetiq.com, issuer=burn.qinetiq.com Nov 19 10:09:09 mailr postfix/smtp[25113]: TLS connection established to burn.qinetiq.com: TLSv1 with cipher AES256-SHA (256/256 bits) Why do I not get any verification messages from the remote postfix server, yet I do with the remote (qmail) one, when both are usiong self-signed certificates? Mark. -- Mark Watts BSc RHCE MBCS Senior Systems Engineer QinetiQ Applied Technologies GPG Key: http://www.linux-corner.info/mwatts.gpg
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