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Comodo KoruMail

Comodo KoruMail

Admin Guide Version

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SMTP Configuration > Greylist
  • Introduction To KoruMail Secure Email Gateway
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Greylist

 

  • Greylisting is a form of spam control whereby Korumail will temporarily reject any email from senders it does not recognize.
  • Upon receiving this 'try again later' message, legitimate mail servers will indeed try to resend the mail after a delay.
  • Korumail will accept the resent mail providing it does not fall foul of its other filters.
  • Spam servers are unlikely to perform this simple resend due to the prohibitive cost of re-sending millions of mails. Thus, greylisting can be an effective way to block junk-mail at source.
    To open the 'Greylist' screen
    • Click 'SMTP > 'Greylist' in the left menu





    See 'Greylist Ignored IP Addresses/Domains' for how to add domains, networks and IP addresses to Greylist ignored list.

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