Yesterday we dealt with a spammer/phisher who specifically targeted the Microsoft outlook.com service (and it’s affiliates). One of the Kolab Now MX servers was listed on the Microsoft throttle list (S3150). This meant that some users saw, that mails sent to recipients at ‘@outlook.com’, ‘@live.com’, ‘@hotmail.com’, and other Microsoft online services was bounced back.
Posts Tagged ‘Support’
Incident report: Some mails to Microsoft online services was getting blocked..
This afternoon earlier today one of the Kolab Now MX servers was listed on the Microsoft block list. This means that some users might have seen, that mails sent to recipients at ‘@outlook.com’, ‘@live.com’, ‘@hotmail.com’, and other Microsoft online services was bounced back with the message that looks something like this:
This is the mail system at host mx.kolabnow.com.I'm sorry to have to inform you that your message could notbe delivered to one or more recipients. It's attached below.For further assistance, please send mail to postmaster.If you do so, please include this problem report. You candelete your own text from the attached returned message.The mail system<some-email@outlook.com>: hostoutlook-com.olc.protection.outlook.com[x.x.x.x] said: 550 5.7.1Unfortunately, messages from [y.y.y.y] weren't sent. Please contactyour Internet service provider since part of their network is on our blocklist (S3150). You can also refer your provider tohttp://mail.live.com/mail/troubleshooting.aspx#errors. [Name=ProtocolFilter Agent][AGT=PFA][MxId=<some long number>][SG2PEPF03345FBECA.apcprd05.prod.outlook.com 2025-02-13T<timestamp>Z<another long number>] (in reply to MAIL FROM command)
Although the listing was fast discovered, Microsoft was contacted and the listing is reversed as soon as it is possible, it took a while. At this time emails should be delivered to the Microsoft online services.
A few users has misinterpreted the symptoms with error messages from missing the DKIM changes made on Monday (please read this blog post from December 2024 and the follow ups). If you are a group manager, then please make sure that you have the new DKIM related CNAMES added to your DNS zone.
If you have any questions or concerns in this context, then please contact support.
Changes: The Kolab Now support system
As most of our users probably know, Bifrost was our support system of choice for many years. It was a great system that served us well all those years, however it also had it’s weaknesses and it is time for a change.
Announcing Service Window: The death of old infrastructure..
On Friday, 20th of January 2023 at 09:00 UTC, the Kolab Now operations team will perform maintenance on the infrastructure of the Kolab Now platform. The update will move a part of the backend services to newer infrastructure. The updates will bring more stability and better manageability to the backoffice systems. No new features visible to end users will be enabled during this maintenance.
The service window is expected to last for no more than 4 hours, ending on Friday, 20th of January 2023, at 13:00 UTC.
Announcing Service Window: Datacenter maintenance..
Our local Swiss datacenter and internet provider is a great, professional and stable provider of data connectivity and datacenter services. These services however demands updates of infrastructure, and such maintenance work is happening in a planned service window the night between Saturday 23.02.2019 and Sunday 24.02.2019.
The end of short logins..
In our ever ongoing effort to improve the service and get rid of legacy, we are again removing old infrastructure and replacing it with new. Where as this is seamless and invisible to some users, we have seen that others are running into – e.g. login issues.
iOS IMAP Connection Issues Resolved
In the last few days, I’ve spent hours and hours configuring accounts on my private iPhone 6 running iOS 11 in order to attempt to nail down where its connection issues originate.
I’m happy to be able to tell you I seem to have nailed it down, and there’s a quick fix for it, that we can apply on the server-side.
Junk Email Filter.com is Junk
We’re dropping our use of junkemailfilter.com “Spam DNS Lists”, because we have few positive experiences with it. Frankly, it is Junk.
Pushing Support to our Enterprise Customer Support Platform
We are preparing a transition from our current platform underpinning the support@kolabnow.com email address — based on OTRS — to a more up-to-date, feature-rich environment based on Phabricator.
For various reasons, we much anticipate this change. Not in the least we’ll have real-time notifications about new tickets, and user responses, and a few chat rooms — it’ll allow us to sort our workload better.
