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On Thu, Apr 1, 2010 at 1:22 PM, Simon Waters wrote: > We forward a lot of email without rewriting envelope sender because we > handle email for many websites that are hosted and see almost no issues with > delivery. Thanks; that answers my question. Still, if email from your domain might be routed through third party-servers whose IP addresses you have no knowledge or control of, you shouldn't publish an SPF record with ~all or -all. To those that got back to me off-list, I hope I didn't scare you; I certainly didn't mean to! If it hasn't caused you any problems, I wouldn't worry about it. But if you want to do it "right" and you are able to change your domain's DNS records, then go to the TXT record, and replace ~all or -all by ?all FYI "-all" means "reject all email from IP addresses that I haven't listed"; "~all" means something similar, but says you're slightly less sure (officially ~ should only be used for debugging/testing, but even paypal.com uses it); "?all" means you're not sure about anything else. Martijn. -- 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