Using classic Outlook for Windows in business environments
Hello Lucas B! My name is Jeremy and I’m happy to help you with your question.
I’m sorry to hear that you are being affected by this issue.
There has been a large influx of customers reaching out to the forums today stating that emails with attachments are not being sent or are being rejected.
Although I do not see it showing as a known issue with the service at this very moment, based on the number of customers reaching out there seems to be a widespread issue.
Please report the issue using the steps listed on the website below.
People are reporting that the problem is only on PC, that their mobile applications work.
Thank you so much for your patience and the time it takes you to fill out the bug report.
I have full faith that this will be a temporary issue.
Thank you for reaching out to the community forums and have a good rest of your day.
Regards,