Prevent Mail Dispatch from Non-Existing Domains ?

Tcalp

• August 12, 2015 11:30

Hey Guys, Does anyone know of an exim filter (or other solution) that I can add to check the from address of e-mail being dispatched and black-holing / rejecting mail sending from domains that don't exist on the server ?

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  cPanelMichael

  • August 12, 2015 17:09

  Hello :) You could try enforcing SPF checking by enabling the following option under "ACL Options" via "WHM >> Service Configuration >> Exim Configuration Manager": "Reject SPF failures" This will reject mail at SMTP time if the sender fails SPF checks. Thank you.

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  Tcalp

  • August 13, 2015 01:53

  Doesn't that also affect in-bound messages ?

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  cPanelMichael

  • August 13, 2015 15:08

  Yes, it will. You may find the following document helpful you are looking more-so to prevent SPAM from leaving your server:

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  tmssyed

  • August 17, 2015 08:11

  does this solution applies on non-existing email accounts. I mean there is a valid domain but spammers creates fake account via script on the website, will this be applicable on existing email accounts as well ?

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  cPanelMichael

  • August 17, 2015 15:58

  New does this solution applies on non-existing email accounts.

  
  Could you verify which solution from the URL in my last response you are referring to? Thank you.

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