Administrator's Guide - Kerio Software Archive
Administrator's Guide - Kerio Software Archive Administrator's Guide - Kerio Software Archive
Chapter 17 Antivirus Control of Email And Attachment FilteringFigure 17.3Server responses to detection of a virus or a damaged/encrypted attachmentDiscard the messageThe message will be removed.Deliver the message with the attachment removedThe message will be delivered to the recipient but without the attachment. Instead,a server message will be attached saying that the attachment has been removed.Forward the message to the administrator addressThe message will be forwarded (intact — with possibly infected or forbidden attachment)to the email address specified. It is not important whether the address is local or remote.Forward the filtered message to administrator addressThe message without an infected or prohibited attachment will be (apart from the actionsselected below) forwarded to the specified email address as well. This can be used forverification of proper functionality of the antivirus and/or attachment filter.If an attachment cannot be scanned ...This section defines actions to be taken if one or multiple files attached to a messagecannot be scanned for any reason (e.g. password-protected archives). The followingactions can be taken:• Append a warning to the message — the message (or attachment) will be deliveredunchecked. The user will be warned that the message may still contain viruses.• Reject the message — the system will react the same way as when a virus was detected(i.e. the message will be delivered without any attachment or rejected). This option issafe, but sending password-protected archives is virtually impossible.Each message is evaluated first by an antispam system, then by antivirus. This saves computertime, since the antispam check is considerably less demanding than the antivirus check. If themessages marked as spam are set to be discarded automatically (in the Spam filter section),all spam messages containing viruses will be discarded as well.200
17.5 Filtering Email Attachments17.5 Filtering Email AttachmentsThe attachment filter can be set in the Attachment Filter tab. If the message is captured bythis filter, it will be delivered to the recipient without the attachment.Figure 17.4Attachment Filter tabEnable attachment filterSwitches the attachment filter on or off.Send a warning to sender ...The sender will receive a warning from Kerio MailServer, that he/she has sent a messagewith a virus or blocked attachment.Forward the original message to administrator addressThe message will be forwarded (intact — with possibly infected or forbidden attachment)to the email address specified. It is not important whether the address is local or remote.Forward the filtered message to administrator addressThe message without an infected or prohibited attachment will be (apart from the actionsselected below) forwarded to the specified email address as well. This can be used forverification of proper functionality of the antivirus and/or attachment filter.List of filtersDisplays individual filters. To the left of each filter there is a checkbox that you can useto enable or disable the filter. Use these checkboxes to switch filters off without the needto remove them.After the Kerio MailServer installation, there is a list of several predefined filters. Allfilters are turned off and the administrator can choose to enable or remove them. Thisway for example executables (.com and .exe), Visual Basic scripts (.vbs), etc. can befiltered.201
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- Page 177 and 178: 16.3 Custom RulesSORBSSpam and Open
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- Page 207 and 208: 18.2 Backup of user foldersFigure 1
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- Page 227 and 228: 20.4 Moderators and MembersAdd this
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- Page 233 and 234: 20.7 How to use Mailing ListsExampl
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17.5 Filtering Email Attachments17.5 Filtering Email AttachmentsThe attachment filter can be set in the Attachment Filter tab. If the message is captured bythis filter, it will be delivered to the recipient without the attachment.Figure 17.4Attachment Filter tabEnable attachment filterSwitches the attachment filter on or off.Send a warning to sender ...The sender will receive a warning from <strong>Kerio</strong> MailServer, that he/she has sent a messagewith a virus or blocked attachment.Forward the original message to administrator addressThe message will be forwarded (intact — with possibly infected or forbidden attachment)to the email address specified. It is not important whether the address is local or remote.Forward the filtered message to administrator addressThe message without an infected or prohibited attachment will be (apart from the actionsselected below) forwarded to the specified email address as well. This can be used forverification of proper functionality of the antivirus and/or attachment filter.List of filtersDisplays individual filters. To the left of each filter there is a checkbox that you can useto enable or disable the filter. Use these checkboxes to switch filters off without the needto remove them.After the <strong>Kerio</strong> MailServer installation, there is a list of several predefined filters. Allfilters are turned off and the administrator can choose to enable or remove them. Thisway for example executables (.com and .exe), Visual Basic scripts (.vbs), etc. can befiltered.201
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