On October 19, 2021, we have enabled single-sign-on for our Plesk Support Center to provide a seamless login/account experience. This implies that you’ll be able to use a single account across any of our web-facing properties.
If you had already registered your account at Plesk 360 (formerly known as My Plesk) please use one for login. Otherwise please re-register it using the same email address as your existing Zendesk login (support account). It’s essential that you use the same email address on our support center to ensure that your tickets stay attached to the same account.

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How to protect a server against mail spoofing

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George Alibegashvili
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Plesk for Windows Plesk for Linux kb: how-to ABT: Group B

Applicable to:

  • Plesk for Linux
  • Plesk for Windows

Question

How to protect a server against mail spoofing?

Answer

Enable SPF check for incoming emails:

  • In Plesk for Linux: Log in to Plesk > Tools & Settings > Mail Server Settings > SPF spam protection > Enable SPF spam protection to check incoming mail. Set SPF checking mode to Reject mail when SPF resolves to "fail"(deny).

  • In Plesk for Windows: It is required to configure the Mail Server manually.

Additionally, it is recommended to enable DKIM and DMARC anti-spam solutions: What is DKIM, SPF and DMARC protection?

More information can be found in Official Plesk documentation.

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