Exchange 2010 sp1 update rollup 5 in production environment.
I have a couple of users who have multiple email accounts so they are set up with their primary account in Outlook 2003 or 2007 as an exchange account. Their secondary account is set up as a pop account.
When they try to send a message with an attachment from the pop account, they get an error "'Sending' reported error (0x800CCC13) : 'Cannot connect to the network. Verify your network connection or modem.'"
Sending the same message with no attachment works fine.
I have read that Exchange 2010 sp1 was supposed to fix this, but it does not, at least not in my case. Running Outlook in cached mode does stop the error, but I can't run outlook in cached mode on a Windows Server 2003 remote desktop server.
I can duplicate it all day long by adding a secondary pop account to any machine I have using Outlook 2003 and 2007, Windows XP and Windows 7.
It is obviously a problem with Exchange 2010 and I have seen many posts about this same issue but is there a real fix for it?