Microsoft Outlook was out again on Sunday evening, mostly for users in Northern Europe.
The incident follows a week of serious email outages that had seemingly ended. The company acknowledged the new problem in a post on its status page on Sunday.
“Users can send email but the messages aren't being delivered to the recipient,” Microsoft reported, according to the Daily Mail.
Microsoft added, “We've developed and successfully tested a fix that will address the issue. We're now in the process of applying the fix to restore email delivery."
These outages come at a bad time, given the onset of the holiday shopping season.
Reports about the new issue peaked around 3 p.m. ET on Sunday on downdetector.
One individual wrote: "Looks like it's totally down with a little message that reads, 'something went wrong, we haven't sent your message yet, check back in a couple of minutes.' Two minutes has long since passed. I'm in Yuma, AZ.
Another user said, "Sent emails not being received. This is going on at least for the past 12 hours. This is ridiculous...!"
However, others later reported that email service had been restored.
Last Thursday, Microsoft suffered a global outage that lasted several hours. And there was a massive outage on Monday of that week, affecting several Microsoft services.