Thanks for your very nice reply i will go with DKIM. On Sat, Jul 14, 2012 at 6:30 PM, Viktor Dukhovni <[email protected] > wrote:
> On Sat, Jul 14, 2012 at 06:23:22PM +0530, achal tomar wrote: > > > actually Viktor this signed by: header requires DKIM authentication so > when > > mails are sent from many servers on the same domain then their > signatures > > are different but having the same signed by: header means that they are > > authenticated from a single domain and this do not requires dkim to be > set > > up in all the servers entry in a single server is enough. > > > > I see no mention of a "Signed-By:" header in the DKIM RFC. DKIM > specifies a "DKIM-Signature" header field: > > https://tools.ietf.org/html/rfc4871 > > If this is what you mean by "Signed-By", then sure, use DKIM to > sign your mail. DKIM signatures require the signing hosts to have > access to an RSA private key associated with the signing domain. > Multiple keys can be associated with the same domain via a "selector". > > Postfix supports DKIM signing either via a milter or a content-filter > such as amavisd-new. > > -- > Viktor. >
