I think 15 years of "good behaviour" is exactly what they're missing. gmails 12 years old. If you've had a well-behaved service for as long as they've been kee

I think 15 years of "good behaviour" is exactly what they're missing. gmails 12 years old. If you've had a well-behaved service for as long as they've been keeping track, that probably weighs in your favour much better than anything else. That said, SPF is worth looking into - but it's more a "good neighbour" thing. Rather than having any direct benefit for you, it helps other hosts spot mails that claim to be from you. "Be the change you want to see" type deal.