Microsoft is currently blocking email delivery from the vivaldi.com domain for reasons unknown to us. This is not affecting outgoing mail for our vivaldi.net mail users, but it is preventing our password reset emails and other important system mails from being delivered to users on these domains.
Update: The block now appears to have been removed.
The Vivaldi Forum is currently experiencing a distributed denial-of-service attack (DDoS) which is unfortunately making things slow for genuine users. We are working to mitigate the problem.
At 11:00 UTC today we will apply upgrades to our Vivaldi Social Mastodon instance. There is expected to be some minimal service disruption during the upgrade process.
Update: Database migrations are in progress, service is currently unavailable.
We are currently unable to deliver mail to domains protected by Microsoft's olc.protection.outlook.com mail servers. This is due to a certificate problem on Microsoft's end. Affected domains include hotmail.com, live.com, outlook.com as well as many other third-party domains hosted under their service.
Update 1: We have applied a workaround on our end to allow mail delivery to these domains to work. Any stuck mails due to this issue should now be delivered.
Update 2: Our mail queue is now clear of stuck mails connected with this issue.
Update 3: A contact at Microsoft has acknowledged the problem and indicated they are working on it.
Update 4: Even though the issue still persists at Microsoft's end, we will close this incident as the workaround is enabling mail delivery to function as normal. We will remove the workaround once we have confirmed that Microsoft have resolved the root cause.
