[AusNOG] Current "Best Practice" WRT email size

[andrew at mcnaughty.com]

From: Shane Short <shane at short.id.au>
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>You're doing this any way, because they have to send the entire email before you decide it's too big and reject it-- assuming you're doing it at SMTP time, I've seen people who don't and send the ENTIRE email back as a bounce. But the congestion surely becomes a network engineering issue then, right? Isn't this what we're paid to fix?
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> And how exactly is this any different from dropbox? You're still needing to get that big file out a small pipe, the medium is (largely) irrelevant.

Two things.  Firstly, when you send via SMTP, the MUA will typically send twice,  to the SMTP server, then to the sent mail folder via IMAP.  Secondly, Dropbox has configurable rate limiting, so it can quietly upload in the background without hogging the whole of the outgoing bandwidth.  
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