On 13/08, "P. A. López-Valencia" wrote:
I've dealt with this kind of issue in the past and the first two measures that you can implement are a) SPF records and b) DKIM signing. All is published in TXT DNS records. The only downside of DKIM is that there are signing facilities for sendmail and postfix only AFAIK and you seem to prefer exim4.
DKIMproxy is a SMTP proxy that can sign and verify DKIM signatures, and should work with *any* smtpd
-- Sincerely, Johannes Löthberg PGP Key ID: 3A9D0BB5
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