All, please excuse this slightly off-topic post. I know there are many mail operators here, and reviewing the SPF protocol /is/ related to anti-abuse, as SPF may help determining the recipients of abuse reports. The IETF working group that is going to write SPFBIS has nearly completed the evaluation of the current deployment. But, thus far, only the analysis of published SPF records was considered --not how SPF results are used. Please contribute to a better understanding by completing the following survey: https://www.surveymonkey.com/s/SPF-deployment-survey It will only take three minutes (ten questions on a single page). Please help reaching all mail admins by forwarding this prompt to specialized mailing lists and mail admins you are in touch with, worldwide. Thank you in advance!