We regularly need to send emails (not marketing but student achievement metrics) to elementary school teachers across the country. We've been getting some of our email blocks at schools and so along with contacting the IT person to get whitelisted, we've just set up an SPF record in GoDaddy's DNS manager. It created a record (with PTR) and a value =

v=spf1 mx ptr include:_spf.google.com. ~all

We send all email through google. Does this seem right? Are there any other records that should be included to maximize the probability of email delivery?

Thanks,

-Vimal