SPF newbie - help needed!

I am trying to set up an SPF record for my domain fojd.org.uk.  My hosting
company, Heart Internet, has suggested:

v=spf1 ip4:82.110.105.67 ip4:79.170.40.142 a mx -all

which looks reasonable to me except that I don't know what those IPs
represent - their mail server IP is 79.170.40.14

I have been told the "reverse DNS" for my domain is broken, but I have no
idea how to fix that.

Can anyone offer some advice to a non-techie please?

Peace,

Christine

 <mailto:cmoon <at> fojd.org.uk> cmoon <at> fojd.org.uk

 <http://www.fojd.org.uk/> www.fojd.org.uk