This would mean that if 1 out of 10 recipients is part of an unknown triplet, the full email will be rejected, so the authorized triplets will not receive the email as well until it is retried. Most of the time the e-mails can be delivered after a new processing. The postmaster receives the following message: Delivery has failed to these recipients or groups: The server has tried to deliver this message, without success, and has stopped trying. It seems that this happens more often with this sender (about 1-2 times a month). The user has a large number of emails for different addresses that have not been sent yet. An advanced feature can set GFI MailEssentials greylist to only allow emails with multiple recipients if all triplets are authorized. i have two customers where normal incoming mails crashing the virus engines. When receiving an email with multiple recipients, GFI MailEssentials greylist will form a triplet for each of the recipients included in the email.īy default, GFI MailEssentials Greylist would allow an email through if at least one of the triplets is authorized. ![]() Once the triplet is received again after a number of minutes, GFI MailEssentials greylist will authorize the triplet, thus not rejecting it again. The triplet consists of the sender SMTP server's IP address, the sender email address and the recipient email address. Logs show that AV engine (s) failed to initialize. ![]() ![]() AnswerGFI MailEssentials Greylist works by temporarily rejecting every email received which contains a unique triplet. Overview Mailflow stops and emails reach the FailedMails folder due to Failed VSE.
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