Sending, receiving, and organizing email in Outlook.com
Hi John, I understand the frustration this issue has caused.
Microsoft has tightened security measures due to a high volume of spam, which could lead to some business emails being missing. This is because the necessary security protocols have not been implemented to ensure email delivery to the sender.
I wish I had an ideal answer for you, but the exact sender needs to contact Microsoft to implement specific policies. Did you ask the sender if they know about it?
Please test using adding a domain in a safe sender list and check.
- Open Outlook on the web at https://outlook.office.com.
- Select Settings (gear icon) > Mail > Junk email.
- Under Safe senders and domains, select Add.
- Enter the domain in the format @contoso.com (replace contoso.com with the actual domain).
- Select Save.
- Ask the sender to resend the email after adding the domain to the safe senders list.
I’m eager to hear back and work together to find a solution.