On 4/25/2012 4:07 AM, Mark Alan wrote:

> While the postfix updates do not get into into each distribution
> repositories, should we use the following?
> 
> postconf -e 'smtpd_tls_protocols = !SSLv2, !TLSv1.2'
> postconf -e 'smtp_tls_protocols = !SSLv2, !TLSv1.2'

It seems this is a reasonable setting for sites that have upgraded
both openssl and postfix to latest versions.

Unfortunately, the !TLSv1.2 option will give an "unknown protocol"
error unless BOTH your postfix knows about that option, AND postfix
is linked with an openssl version that has that option.  End result
is this can't be a global postfix default setting, and can't be used
on older postfix versions.  There is no workaround for this.


  -- Noel Jones

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