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Ghost Sender in Exchange Online: Ein MX-Record ist keine Firewall

rafaelpfister.ch · published 15 July 2026

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Links from this post

Link
Host
https://labs.infoguard.ch/posts/ghost-sender/?utm_source=rafaelpfister.ch
labs.infoguard.ch
https://www.heise.de/news/Ghost-Sender-Exchange-Online-laesst-gefaelschte-E-Mails-anstandslos-durch-11327666.html?utm_source=rafaelpfister.ch
heise.de
https://crowinthe.cloud/die-geister-die-ich-nicht-rief-effektiver-schutz-gegen-ghost-sender-in-exchange-online/?utm_source=rafaelpfister.ch
crowinthe.cloud
https://techcommunity.microsoft.com/blog/exchange/direct-send-vs-sending-directly-to-an-exchange-online-tenant/4439865?utm_source=rafaelpfister.ch
techcommunity.microsoft.com
https://www.rfc-editor.org/rfc/rfc5321.html
rfc-editor.org
https://learn.microsoft.com/en-us/exchange/mail-flow-best-practices/manage-mail-flow-using-third-party-cloud?utm_source=rafaelpfister.ch
learn.microsoft.com
https://www.msxfaq.de/cloud/exchangeonline/transport/exo-nebeneingang.htm?utm_source=rafaelpfister.ch
msxfaq.de
https://www.rfc-editor.org/rfc/rfc9989.html
rfc-editor.org
https://learn.microsoft.com/en-us/exchange/mail-flow-best-practices/use-connectors-to-configure-mail-flow/enhanced-filtering-for-connectors?utm_source=rafaelpfister.ch
learn.microsoft.com
https://learn.microsoft.com/en-us/powershell/module/exchangepowershell/set-organizationconfig?view=exchange-ps&utm_source=rafaelpfister.ch
learn.microsoft.com
https://outlook.office.com/bookwithme/user/b4d64d6bdbca4b489074d459cd30b50c@adeptio.ch/meetingtype/3Wgk7rXJfk261852Hyovkg2?anonymous&utm_source=rafaelpfister.ch
outlook.office.com
https://adeptio.ch/
adeptio.ch
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