SharePoint Library Incoming E-Mail failure

I have document libraries that are setup with incoming email.  However the email was never reaching the document library.  It was getting to the drop folder ([drive]:\inetpub\mailroot\drop) so the problem was within SharePoint.  Turns out the logs were complaining about the site collection quota had been exceeded... which wasn't the case because I know the site quota was more than 4 times the current size.

After talking to Technical Support the quota needs to be set in two locations:

• Web Applications > General Settings  (I had it set here)
• Site Collections > Configure Quotas and Locks (I didn't have it set here)

After setting it in both locations emails began to flow.  I think I kicked off the job to make sure (Timer Job Status > Microsoft SharePoint Foundation Incoming E-mail > Run Now).


There are several other pieces to the puzzle to make incoming email functional.  Many of these are the functional rolse of a network and exchange administrator(s):

• Install and configure SMTP service on the SharePoint server via IIS Manager 6.0.
• MX Records in DNS
• Incoming E-mail settings in Central Admin.  Setup as basic first, then advanced to allow SharePoint to create contacts in AD so they show up in the global address book... there are some exchange settings to make that work.
• Hub Transport --> Send Connector in Exchange 2010 (for local senders).
• If internet accessible: Firewall settings and spam filters.
• Important: Be sure to prevent spam and open relay when setting up SMTP.