On Wed, Mar 26, 2014 at 10:51:29PM +0100, Pau Peris wrote:

> Are you really sure? I mean, do you know where can i find information about
> this topic?

Do you disbelive you own findings?  You report that the same
certificate is accepted when the MUA is configured to connect to
the subject commonName and rejected when the client is configured
to connect to a DNS subjectAltName.  What conclusion do you draw
about the MUA?

> As i planned to operate that way, buying cheap ssl certs for
> multiple domains/subdomains i would like to be sure before discarding that
> procedure.

The subject DN needs to be compatible with the needs of clients
that don't support subjectAltNames.  This may limit your freedom
to choose server names and will constrain the set of usable
certificates.  Clients that support subjectAltNames can be handled
by adding appropriate DNS subjectAltNames.

-- 
        Viktor.

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