Sending, receiving, and organizing email in Outlook.com
Hi,
I will walk through a few steps with you. Some of these are just to help figure out what is wrong, not to fix it right away. So if nothing changes after a step, that is normal. I will keep going until we solve it.
Do the senders receive any bounce-back message?
I look forward to hearing from you to get the results of the troubleshooting.