A company's marketing emails are either being found in a spam folder or not being delivered at all. The security analyst investigates the issue and discovers the emails in question are being sent on behalf of the company by a third party, mail.marketing.com. Below is the existing SPF record: v=spf1 a mx -all Which of the following updates to the SPF record will work BEST to prevent the emails from being marked as spam or blocked?
A) v=spf1 a mx redirect:mail.marketing.com ?all
B) v=spf1 a mx include:mail.marketing.com -all
C) v=spf1 a mx +all
D) v=spf1 a mx include:mail.marketing.com ~all

Question

Quizplus · Accepted Answer

Including "include:mail.marketing.com" allows the third-party mail server to send emails on behalf of the company. The "~all" mechanism is a soft fail, which is less strict than "-all" and helps reduce the chances of emails being marked as spam.

A Company's Marketing Emails Are Either Being Found in a Spam