
Exchange Server 2010 can send and receive email globally.
Zeeman1:
Install and configure the SMTP service
IIS 6.0 Manager--SMTP
Access tab--Access Control--Authentication--Anonymous Access
SharePoint Central Administration
Operations>Incoming E-Mail Settings
DNS server
zeeman1.vanarts.com record is created.

Ensure that the domains that are listed under the SMTP server in IIS match the FQDN of the server that receives e-mail. If they do not match, you must create a local domain.
Exchange Server 2010
Create a send connector
new-SendConnector -Name 'ToZeeman1' -Usage 'Custom' -AddressSpaces 'SMTP:zeeman1.vanarts.com;1' -SmartHosts 'zeeman1.vanarts.com' -SmartHostAuthMechanism 'None' -SourceTransportServers 'EX0'
http://zeeman1

Send e-mail from Exchange server 2010 to share@zeeman1.vanarts.com
Only the attachments are added to SharePoint folder.
Send several e-mail to share@zeeman1.vanarts.com
A folder "Test" is created in SharePoint and the attachment is uploaded inside it.