How do I set a file size limit on email attachments?

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Description	Setting a file size limit on email attachments.
Components	All FortiGate running FortiOS 2.8 or 3.0.
Steps or Commands	Note: For email scanning, the oversize threshold refers to the final size of the email after encoding by the email client, including attachments. Email clients may use a variety of encoding types and some encoding types translate into larger file sizes than the original attachment. The most common encoding, base64, translates 3 bytes of binary data into 4 bytes of base64 data. A file may be blocked or logged as oversized even if the attachment is several megabytes less than the configured oversize threshold. See also How do I block oversized files or email?. FortiOS 3.0 To set the oversized threshold for files and email Go to Firewall> Protect Profile. Select a profile or select Create New. Select the blue arrow for AntiVirus to expand the options. Set thresholds for each protocol as required. Select OK. Use the protection profile in a firewall policy. FortiOS 2.8 To set the oversized threshold for files and email Go to Antivirus> Config> Config. Set thresholds for each protocol as required. Select Apply.