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Schöffmann Matthias wrote: |
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> Hi! |
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> |
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> I have the following problem: I want a postfix-server between my |
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> mailserver (exchange) and my smarthost (postfix) witch relays all |
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> mails without attachments and put all mails with attachments in a |
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> queue to preview the mails (per web interface?) and deliver this ones |
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> only when i manually allow them. |
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> |
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> Any ideas? Maybee with a "antispam-solution" whicht quarantines all |
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> mails with attachments? |
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> |
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> Greets from austria |
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|
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I think it's much simpler to do: |
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|
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Internet <--> Postfix/Spam/SmartHost/etc <--> Exchange |
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|
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I'd look into setting up clamav and amavis-new which would pretty much |
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automate the whole process. I also do some header filtering to keep |
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obvious spam attachments from hitting the sometimes CPU intensive virus |
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and spam filtering processes. |
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|
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/etc/postfix/mime_header_checks.regexp |
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/^\s*Content-(Disposition|Type).*name\s*=\s*"?(.+\.(ad[ep]|asd|ba[st]|c[ho]m|cmd|cpl|crt|dbx|dll|exe|hlp|hta|in[fs]|isp|js|jse|lnk|md[etw]|ms[cipt]|nws|ocx|ops|pcd|pi|pif|prf|reg|scf|scr|sct|sh[bms]|swf|uue|vb|vb[esx]|vxd|wab|ws[cfh]))"?\s*$/ |
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REJECT Files attached to emails that contain or end in "$3" are |
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prohibited on this server as they may contain viruses. The file named |
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"$2" was rejected. |
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|
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/etc/postfix/main.cf |
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# attachement filtering |
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mime_header_checks = regexp:/etc/postfix/mime_header_checks.regexp |
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|
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You may want to add or remove extentions based on what works for you and |
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your users. |
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|
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kashani |
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-- |
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