Thread: What exactly happens when a user sends a 300MB attachment?

I figured out this to prevent it from happening again: Set-TransportConfig -MaxSendSize 15MB But I'd still like to hear how others might have troubleshot the issue. Like I said, if that end user didn't speak up I'd never had known.  

I wrote about back pressure problems involving the transport queue, and how to move it at http://ww w.petri.co .il/back-p ressure-mo ving-queue -database- in-exchang e-2007.htm Pat Richard MVP Plan for performance, and capacity takes care of itself. Plan for capacity, and suffer poor performance. http://www.ucblogs.net/blogs/exchange/  

When you send, it goes to the transport hub and then to the mailbox or external.  Set -transportconfig is the right place to set the limit. As the message gets spooled into the transport hub database, I could see where you'd have problems with version buckets and disk.  The hub database is realitivly small and unless you put it somewhere else, it's on the mirror with your system...