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(blog entry)
Friday 10 April 2009
SPF with bethere.co.uk
Just in case you're using the ISP bethere.co.uk and you're geeky enough to know what SPF is. Here's the details.
Mail seems to come from a whole load of different servers, including the following.
135.255.194.87.in-addr.arpa name = phil.london.02.net. 136.255.194.87.in-addr.arpa name = jill.london.02.net. 137.255.194.87.in-addr.arpa name = pip.london.02.net. 138.255.194.87.in-addr.arpa name = josh.london.02.net. 139.255.194.87.in-addr.arpa name = jenny.london.02.net. 140.255.194.87.in-addr.arpa name = lillian.london.02.net. 141.255.194.87.in-addr.arpa name = grundy.london.02.net. 142.255.194.87.in-addr.arpa name = aldridge.london.02.net. 143.255.194.87.in-addr.arpa name = april.london.02.net. 144.255.194.87.in-addr.arpa name = honeysuckle.london.02.net. 145.255.194.87.in-addr.arpa name = woodbine.london.02.net. 146.255.194.87.in-addr.arpa name = phil-2.london.02.net. 147.255.194.87.in-addr.arpa name = jill-2.london.02.net. 148.255.194.87.in-addr.arpa name = pip-2.london.02.net. 149.255.194.87.in-addr.arpa name = josh-2.london.02.net. 150.255.194.87.in-addr.arpa name = 87-194-255-150.bethere.co.uk. 151.255.194.87.in-addr.arpa name = jenny-2.london.02.net. 152.255.194.87.in-addr.arpa name = lillian-2.london.02.net. 153.255.194.87.in-addr.arpa name = grundy-2.london.02.net.
Rather than listing each in a a: record, it's prob just easier to allow their entire network with a rule like this.
v=spf1 ip4:87.194.255.1/24 mx ~all