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I have received complaints from people that they are getting job offer letters from my company email address. How can i stop this ?

  • Does your company use something like DMARC? – A. Darwin Aug 22 '16 at 12:13
  • If you use your own mail server, you could've been compromised. Contact a local IT security professional to help you diagnose your systems. – Steve Dodier-Lazaro Aug 22 '16 at 12:32
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If your server has its mail relays open, it might be used to send spam emails. For more information take a look:

https://uk.godaddy.com/help/testing-your-server-for-open-relays-8495

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