Hi all, I have a problem with big mails. I've set all users in the store bymaxsendsize 5MB with powershell. And from the send connector as well. When I've checked the limits by user id's I could see the limits what I've done. But sometimes huge mails stuck the Hub Transport Server and crashs down it. Do u have any idea for that? Thanks...

Clarify: Mails [Less than 5 MB] have stuck in the HUB servers queue Collect info: 1. How many users encounter this issue, all users? 2. Is there any NDR received in the problematic users mailbox? 3. Does there has any GPO related to attachment control in your environment? 4. Please reproduce the issue, check the last error when the mails stuck in the queue Several places to check the size limitation: 1. Organizational limits: EMC->Organization Configuration->Hub Transport->Global Settings tab->right-click Transport Settings, select General tab, check Maximum send size 2. Connect limits [You have checked, right?] 3. Server Limits: EMC->Server Configuration->Mailbox->Mailbox Databases Properties->Limit tab 4. User Limits: EMC->Recipient Configuration->Mailboxs Properties->Mail Flow Settings tab->Message Size Restrictions References: Managing Message Size Limits Setting Message Size Limits