SPF - should I implement?
In relation to this question and I've also been warned against it myself by an ISP tech, what are some of the common reasons against using SPF, whether valid or otherwise?
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I suggest you set up an SPF record i have set SPF records for my domains for a while now and i see no negative impact of any kind , the whole idea behind SPF records is to HELP you .
the comment by Marcel about creating the SPF record properly is obcourse a good idea.
you can refer to the following "Wizards" that assist you in creating your spf records based on the input you provide.
Good luck :)
Regards, Eli B.