On Sun, Aug 25, 2013 at 04:27:36PM -0400, Jerry wrote:

> Aug 25 16:20:15 scorpio postfix/smtpd[76114]: warning: TLS library problem: 
> 76114:error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown 
> ca:s3_pkt.c:1256:SSL alert number 48:

Most likely the remote SMTP client (zeus) does not like the
certificate authority that issued your server certificate.

> This system had been working fine previously, so I am unsure of what
> has transpired. This is happening on a FreeBSD-8.3 STABLE amd64 system
> with Postfix (2.11-20130405).

The remote SMTP client configuration has changed, or your Postfix
SMTP server certificate configuration has changed.

-- 
        Viktor.

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