Kyle Jensen

Email deliverability is a a huge problem. I’m a big fan of Google Appengine and send a fair amount of email from it. I noticed recently that some of it was being caught, particularly by the Postini spam filter on the most aggressive setting. After investigating, I decided to set up the SPF DNS record for the domains sending email from Appengine. But, there’s a catch, answered by a clever fellow in this thread. The correct DNS TXT entry is

v=spf1 include:aspmx.googlemail.com ~all

not

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

which is suggested in this google answer. However, this other answer on configuring SPF with GoDaddy is quite useful.

To verify your SPF record is set up correctly, use the following command to inspect your DNS TXT entries:

dig TXT your-domain-here.com