Please see domain health report (from mxtoolbox.com) attached. Trying to solve some problems with clients claiming they're not receiving forwards or emails (bulk send to 140 recipients using address list in bcc). I don't think the two reported issues have any effect but it might be beneficial for your tech team to see the generated report for our domain.
I'm not able to attach the report (getting an error from the service you use). However, if you go to mxtoolbox.com, enter in our domain, mill-irond.org you'll get access to all of the data (no cost).