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Block user <> email for imap login

Discussion in 'Security' started by kjg, Sep 6, 2017.

  1. kjg

    kjg Well-Known Member

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    Hi all
    We are again getting loads of distributed imap login attempts from primarily China with users such as support, postmaster, contact, etc. With "loads of" I mean tens of thousands per day on some servers.

    All accounts on server uses email accounts to login to email (no-one uses account name, only email@accountdomain.com)

    So my "simple" question is:
    Is there any way to block dovecot login attempts from users that are not email addresses (testing on if @ exists in user would be enough for us)
     
  2. cPanelMichael

    cPanelMichael Forums Analyst
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