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Tag Archives: Mail
Outlook.com service disruption continues on March 13/14, 2025
[German]There is no end to the disruption of the Microsoft cloud service outlook.com. Since March 1, 2025, the cloud services (Exchange Online, outlook.com, outlook.de etc.) have been experiencing repeated outages. The status is also disrupted on March 13 and 14, … Continue reading
What is behind DKIM, SPF and DMARC?
[German]Email security for Security Operations Center (SOC) teams. What is hidden behind terms such as DKIM, SPF and DMARC, which are used to secure email communication?
Does Microsoft Exchange Online change the e-mail sender?
[German]I'm posting an observation from a German blog reader that relates to Microsoft's Exchange Online. The reader is confronted with the problem of complaints from business partners about emails that have not "arrived". There is a suspicion that Exchange Online … Continue reading
Prevent migration from Classic Outlook to New Outlook
[German]Microsoft plans to switch certain Microsoft 365 user groups from Outlook Classic to the new Outlook app from the beginning of 2025. Some people has developed remediation solutions to prevent this. Here is a solution I came across yesterday.
Email bombing: A new spam campaign? Or a cover-up for a (black basta) attack?
[German]A German blog reader recently shared an observation from his IT department with me. An employee was bombed by a veritable wave of spam mail (more than 1,000/hour). All the emails had some kind of confirmation for a registration, which … Continue reading
Why ISL Online: Critical factors when choosing a remote desktop solution
[Sponsored Post]In the rapidly evolving IT world, choosing the right remote desktop software is critical for organizations that value security, ease of use and reliability. One provider of secure remote access that has been on the market since 2001 is ISL Online, which presents some considerations for choosing such software below. More ...
Windows: Mail app will no longer work from December 31, 2024
[German]Brief information for users of Windows 10 (and possibly Windows 11) who are still using the "Mail and Calendar" app as their email client. Microsoft has started the transition to the new Outlook app. Anyone holding on to the old … Continue reading
HornetSecurity quarantines Microsoft Exchange emails (July 2, 2024)
[German]A information to the administrators among the blog readership who use HornetSecurity to filter mails (e.g. in Microsoft Exchange). A reader informed me that the mails in question (for Exchange) have been quarantined. On the HornetSecurity status page there is … Continue reading
Spoofing vulnerability allows emails to be sent under Microsoft's name
[German]An unpleasant story: There is a vulnerability in Microsoft's email services that allows third parties to send emails on behalf of Microsoft. As far as I know, Microsoft has confirmed this bug, but has not yet patched it. This means … Continue reading
Microsoft will better secure private Outlook mail accounts
[German]A few days ago, Microsoft made an announcement that it wants to better secure "Outlook for private users" in future. The mention of Outlook is a bit of a misnomer. The aim is to improve the security of online e-mail … Continue reading
Hornetsecurity is down (June 7, 2024; since ~ 7:00 a.m.)
[German]German blog reader Jona contacted me a few minutes ago and asked, whether I know anything about a malfunction at "Hornet-Security". In the meantime, there is a second report from Matthias about a service disruption. But it looks as if … Continue reading