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On Tue, 2010-01-26 at 13:21 +0000, Simon Waters wrote: > Martijn Grooten wrote: > > > > It's interesting, as I think DKIM is much more powerful, but perhaps > > it's because SPF is easier to use. > > s/easier to use/more widely implemented in software/ > > I looked at DKIM for postfix, and it is only just getting to the point > where I could offer it and expect my colleagues to stand a chance of > sorting it if it went wrong. > > I don't think the situation is that different for other MTAs, > The latest version of Exim supports DKIM. However I see that ADSP has become an RFC (5617) as of last August, so that will no doubt be the next step. Whilst I would agree that blocking mail based on the SPF/TXT record is likely to lead to complaints, it is possible to block those domains which specify that no mail will ever be sent from them (e.g. v=spf1 -all). John. -- John Horne, University of Plymouth, UK Tel: +44 (0)1752 587287 Fax: +44 (0)1752 587001 -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html