![]() Without authentication, the message is blocked. This is to prevent sender address spoofing. Message from IP address 195.245.231.144, sender rejected: sender domain requires authenticationĪs the sender domain is hosted on the mail server, the client must authenticate to send the message. If the client had authenticated, the message would have been allowed. Relay attempt from IP address 72.9.146.151, mail from to rejectedĪs the recipient domain is not a domain that the mail server is responsible for it will discard the message. Some Spam score will be added to the message. The IP address of the client (sending mail server) is in the indicated black list, but it is allowed to be delivered. IP address 72.9.146.151 found in DNS blacklist UCEPROTECT L1, mail from to It will not be allowed to transmit the mail. The IP address of the client (sending mail server) is in the indicated black list and is blocked immediately. IP address 93.85.133.206 found in DNS blacklist SPAMHAUS ZEN, mail from to rejected This is indicative of bot net Spam as normal mail servers would not do that. It has started to send commands (such as HELO) and data too early. It means that the client (sending mail server) hasn't waited the 25 seconds (or whatever is configured in Spam Repellent) until the SMTP greeting appears. This message only appears if Spam Repellent is switched on. SMTP Spam attack detected from 69.94.153.232, client sent data before SMTP greeting It means that the client (sending mail server) hasn't waited the 25 seconds (or whatever is configured in Spam Repellent) for the SMTP greeting. SMTP Spam attack detected from 85.51.174.157, client closed connection before SMTP greeting Select whether Kerio Connect blocks or accepts messages with this file type.Find below a list of messages that can appear in the security log of Kerio Connect 8.0 and what they mean:.Define the Condition for the attachments - Filename or MIME type.Each rule can allow or block a specific file type. Enable any of the predefined filter rules.To discard the ZIP attachments with dangerous files, select the Discard zip archive containing files with dangerous extensions option.To have Kerio Connect send the filtered messages to a different email address, select the option Forward the filtered messages to and enter the required email address.To have Kerio Connect send the original messages to a different email address, select the option Forward the original messages to and enter the required email address.If you want Kerio Connect to notify senders that their attachments were not delivered, select the option Send the sender a warning informing that the attachment was not delivered.Check the Enable attachment filter option.Navigate to Configuration > Content Filter > Attachment Filter.Log in to the Kerio Connect administration console.Filter rules are applied globally for all domain users from incoming and outgoing emails. Blocked attachments will be removed and the email from the sender is being received by the recipient.ĭepending on Attachment Filter rules, the specific file or MIME type extension can be blocked or accepted. Kerio Connect has a built-in file filter feature that allows detecting a specific type of file, such as zip archives, and automatically block and filter malicious attachments.
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