This was also found to affect Teamraiser coaching emails if the configured sender email address was from a domain that implemented a "reject" policy via DMARC. This was especially an issue for those clients who allowed sending coaching emails via the event management center as the event manager would be more likely to use a personal email address which might be from an affected domain.
*UPDATE* 14.4.3 emergency update was installed for North American clients 4/21/2014 with this change to the product. See the bottom of the article for a link to screenshots showing the format of the constituent sent emails.
For coaching emails, an interim change was made in Luminate Online release14.7.0a to warn event managers to not use email addresses from the domains affected.
In Luminate Online release 14.8.0, coaching emails no longer offer the ability to customize the email address used for the From attribute. Instead, as with PC2 sent email, the From address is taken from the site option NOTIF_FROM.
What do you need to do?
The email address used in the FROM section of the constituent sent email will be the "NOTIF_FROM" email address on your site (under the Setup menu, Site Options)
Check to be sure this is an email address that represents your organization, and also you can verify that the domain on that email address has SPF configured. To check that, please view this article.
Click here to see screenshots of the various large email providers and how email will appear there.