Outlook issue sending to gmail accounts as of Jan 2024

Question

Following the change in gmail security around Jan 2024 messages all sent from Outlook running on Windows 10, with all released patches in place, get bounced with reference to a security message indicating that sender is unauthorised.

PC is a HP ENVY Notebook - 15-ae107na which fails the Windows11 compatibility check. Running Windows 10 Version 22H2, OS build 19045.5011 with all patches automatically installed.

Is this a Windows 10 Outlook issue and is it also a problem with Windows 11 if the PC was changed?

Is this an issue with the sevice provider's e-mail system (btinternet.com)? Wife uses Mozilla/gmail.com and has no such problem.

Answer 1

Hi @David Dobson

Welcome to our forum!

For better research, please provide more details about this case:

Is there a problem with sending emails only to Gmail users?

What version of Outlook client? Make sure to update to the latest version.

If it's just a specific user, try contacting the recipient to make sure you're not blocked, and it's recommended that you be added to the safe senders list.

If all users can't send messages, try the following possible solutions:

Make sure that your Outlook settings are configured correctly and that you don't have security settings that cause email to be blocked.

Log in to your browser client and check if you can send an email.

Test on another device to rule out if it's the device that's causing the issue.

---

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

---