I'm having an issue with incoming emails size restrictions in exchange. We are running exchange 2013 what's happening is a sender from outside our network will send an employee a email with attachments over 9mb and we never receive them and the sender doesn't receive a kick back so they think it was delivered. When I run
get-mailbox username | ft max messagesize it states "unlimited"
get-transportconfig | ft maxreceivesize it states "40 MB"
get-receiveconnector | ft username, maxmessagesize it states "35MB"
Am I missing something that maybe set to block over 10mb from external senders?