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evsmetal

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I have my "Limit maximum incoming SMTP message size" to 200 MB.

How exactly does that break down if there is multiple recipients of a message.

For instance, it's obvious that for 1 recipient, he can get 200 MB per message.

If the same message is sent to 2 people, is an attachment now limited to 100 MB?

The issue I have is my sales and engineering depts. get large file attachments (CAD drawings), and the message is usually sent to 4 people at once.

In that scenario, is the max attachment now 50MB? Or is it still 200 MB per recipient? [I read the manual and searched the forum, but really couldn't find a plain answer..]

[Updated on: Thu, 13 December 2007 00:42]

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microalps

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The SMTP protocol receives one DATA command with the content of the email but multiple RCPT commands with the destination email address(es). As a result, this limit shouldn't be affected by the number of recipients. I will note that the SMTP protocol generally uses base64 encoding for attachments. Very roughly, the final size of base64-encoded binary data is equal to 1.37 times the original data size. Which means the actual file size you can send is less than 200MB that you specified.
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evsmetal

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Good to know. Thank you.

When we were running Exchange, the file size was split amongst the recipients as far as I remember.
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