• Please be aware: Kaspersky Anti-Virus has been deprecated
    With the upgrade to Plesk Obsidian 18.0.64, "Kaspersky Anti-Virus for Servers" will be automatically removed from the servers it is installed on. We recommend that you migrate to Sophos Anti-Virus for Servers.
  • The Horde webmail has been deprecated. Its complete removal is scheduled for April 2025. For details and recommended actions, see the Feature and Deprecation Plan.
  • We’re working on enhancing the Monitoring feature in Plesk, and we could really use your expertise! If you’re open to sharing your experiences with server and website monitoring or providing feedback, we’d love to have a one-hour online meeting with you.

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    Question Postfix-Spam: Connect from unknown host - invalid sender adress

    Hi, thanks for the answers, I´ve enabled "Relay Options" with "authorization is required" on "SMTP". The E-Mails comes from on "non-existing" user (for example: Gina85@...) to an existing user. If I see this right, the user are not authenticated. Mail Setting for my Domains => non-existing...
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    Question Postfix-Spam: Connect from unknown host - invalid sender adress

    Does somebody has any idea?
  3. S

    Question Postfix-Spam: Connect from unknown host - invalid sender adress

    Hi everyone, i have a litte problem on my hosting Server. I´ve installed Ubuntu 12.04.5 LTS‬ with Plesk Version 12.5.30 Update #44. Since few weeks ago I got many spam e-mails throw the server. So i look up to the logs and i found some entry: The sender e-mail adress does not exists on the...
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