On 2014-04-19 Sat 08:26 AM |, Martin Braun wrote: > > I was thinking about adding DKIM and SPF to my OpenSMTPD setup as I > have previously run with those, but I am in doubt. > > I am thinking about the "worth" of those technologies? >
OK for sending, waste of time for receiving validation. SPF is grossly abused, and DKIM mail must be received before it can be inspected. Useless. See the section "SPF found potentially useful" and the 1st comment of: http://bsdly.blogspot.co.uk/2007/07/harvesting-noise-while-its-still-fresh.html OpenBSD's spamd + greyscanner rocks! These helpers work with spamd for bulk trap address loading: http://web.britvault.co.uk/products/abersnuik/ http://web.britvault.co.uk/products/spamdba/ I've vastly modified greyscanner to check DNS PTR records & DNS RBLs. e.g: https://bitbucket.org/bonetruck/greyscanner/pull-request/5/ Nothing else is needed to filter incoming spam. -- You received this mail because you are subscribed to [email protected] To unsubscribe, send a mail to: [email protected]
