Outlook email stopped forwarding to Gmail account?

Question

Hello, I am hoping someone will be able to help. The company I work for uses Outlook email, and I have my account set up to forward all emails to a gmail account. This has been working splendidly for over a year, but just last week the emails stopped being forwarded and sometimes people sending emails to me received delivery failure notices.
The delivery failure notice email that I have in my Outlook email inbox says 'Your message wasn't delivered because the recipient's email provider rejected it.' I have not changed any settings for either the Outlook nor the Gmail accounts, and my organisation's account administrator doesn't believe that they have made any changes to the Outlook company account either. Below is a screenshot of part of the diagnostic information that is included in the delivery failure notice:

I have, since the problem started, turned off forwarding in order to prevent anyone sending emails to me to get the delivery failure message.

Anyone have any ideas why the forwarding would suddenly stop working, and perhaps more importantly what I can do to fix it?

Much appreciated,
Clare

Answer 1

Hi see, these threads on how to fix:

https://learn.microsoft.com/en-us/answers/questions/131322/undeliverable.html?childToView=131855#answer-131855
https://learn.microsoft.com/en-us/answers/questions/126453/office-365-outlook-email-issue.html?childToView=130998#comment-130998

Answer 2

Hi @Clare CFD , agree with the reply above, check Automatic forwarding enabled is on - forwarding is enabled.

I tried in my environment forwarding mails to external address and it can work properly. So I want to confirm with you: your issue occurs on all external addresses or only Gmail account?

In addition, if you use inbox rule forwarding messages, please make sure the individual recipients less than 10. Like this link introduced:

Inbox rule to forward messages doesn't work in Office 365

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Answer 3

Clare, I had the same issue. I dug through the message updates from microsoft 365, on October 12, they stopped support for mail forwarding. below is what they sent with directions on what to do.

Follow up to MC221113: Office 365 ATP External email forwarding controls and policy change
MC223357

Unfortunately, I could not make any changes as Microsoft doesn't recognize me as an administrator (even though I set it up, paid for it and have no employees) If MS had a help line you could call, or the answers actually helped resolve issues, this wouldn't be a problem.