![]() ![]() This filter can be configured to execute when the full email is received or at SMTP level, that is, emails are filtered while they are being received. Items remain in the cache for 4 days and are cleared on GFI MailEssentials AS Scan Engine service restart. ![]() GFI MailEssentials maintains a cache with the results of queries to the IP DNS Blocklist to avoid querying the IP DNS Blocklists multiple times for the same IP addresses. There are a number of third party IP DNS Blocklists available, ranging from reliable lists that have clearly outlined procedures for getting on or off the IP DNS Blocklist to less reliable lists. ![]() GFI MailEssentials supports a number of IP DNS Blocklists. IP DNS Blocklist checks the IP address of the sending mail server against a public list of mail servers known to send spam. ![]()
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