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> Attachment size limits aren't there just to fuck with you.

Although bandwidth and storage have greatly been raised, the scaling problem remains: send a single email with the usual limit of 10MB to 20 recipients, and it will balloon to 200MB total at some point, possibly multiple times even. Scale this up, and you've quickly got a problem. What's more, either you put on limits or become a target for volume-filling DoS, and whatever limit you put on will be used and abused (ever seen those professional PPTs filled with ridiculously sized, uncompressed BMPs?).

So when sending big files email basically becomes a form of push signalling mechanism, where voluminous resources can be pulled on demand. Maybe a standardization of this process is in order instead of everyone coming up with its body-embedded HTML presentation mimicking regular file attachments? Something like a multipart message with mime type application/email-attachment-uri, which would make it nice to text-only modes.

BTW this really looks like what's currently implemented in Sparrow with CloudApp or Dropbox.




Also don't forget that attachments are usually base64 encoded which increases the size by 33%.




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