Kerio Connect - Administrators Guide - Kerio Software Archive
Kerio Connect - Administrators Guide - Kerio Software Archive
Kerio Connect - Administrators Guide - Kerio Software Archive
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Configuring greylistingFigure 1GreylistingHow greylisting worksWhat happens when <strong>Kerio</strong> <strong>Connect</strong> receives a message?1. <strong>Kerio</strong> <strong>Connect</strong> contacts the greylisting server and provides information about the message.The greylisting server includes a list of trustworthy IP addresses.2. If the list does contain the message sender’s IP address, the message is deliveredimmediately.3. If the list does not contain the sender’s IP address, the greylisting server delays thedelivery — trustworthy mailservers retry to deliver messages later (spam senders usuallydo not).4. Once the message is received again, the <strong>Kerio</strong> Greylisting Service adds the sender’sIP address to the whitelist — all future messages from this sender will be deliveredimmediately (see step 2).120
Change language