Hi Viktor,

Thanks, that seems to have worked. Now for the next layer of the onion. Do I 
just keep appending root certificates to that same file or does each 
certificate have to be set up separately somehow?
On Jan 6, 2010, at 10:09 AM, Victor Duchovni wrote:

> On Wed, Jan 06, 2010 at 10:00:37AM -0500, Dennis Putnam wrote:
> 
>> I am using CACert as my signing authority. I have included their root 
>> certificate in my main.cf:
>> 
>> smtpd_tls_CAfile = /etc/postfix/ssl/root.crt
> 
> This is for verifying client certificates when clients connect
> to your SMTP server.
> 
>> However, I get this error when it tries to set up a TLS connection:
>> 
>> postfix/smtp[5298]: certificate verification failed for 
>> xserveoda.aimaudit.com[70.158.194.7]:25: untrusted issuer /O=Root 
>> CA/OU=http://www.cacert.org/CN=CA Cert Signing 
>> Authority/emailaddress=supp...@cacert.org
>> 
> 
> This is your SMTP client sending to remote servers. Consider adding this
> certificate to:
> 
>    smtp_tls_CAfile = /some/file/with/all/trusted/ca/certs.pem
> 
> OR
> 
>    smtp_tls_CApath = /some/directory/with/all/trusted/ca/certs/
> 
> In the latter case, you need to run the "c_rehash" utility from OpenSSL,
> to re-index the directory when it is updated. Note that c_rehash is
> not atomic, and may temporarily disrupt verification while it is
> running, so if you use the "secure" or "verify" tls levels, you
> want to stop your MTA before running c_rehash, or run c_rehash
> in new directory, and atomically update a symlink to cut-over to
> the new certificate set.
> 
> I have as yet been too lazy to contribute a more robust c_rehash
> to the OpenSSL project. Sorry about that... :-(
> 
> -- 
>       Viktor.
> 
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> 



Dennis Putnam
Sr. IT Systems Administrator

AIM Systems, Inc.
11675 Rainwater Dr., Suite 200
Alpharetta, GA  30009
Phone: 678-240-4112
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