How to send customer email notifications (alerts) without customer email server?

Hi,

Customer has externalized the Email Services, so they don't have an email server in their company. They still would like to receive alerts emails from VNX, but now they don't have his own SMTP Server to do that. I've read in the ESRS release notes:

Note: The email server is on the customer's network. ESRS should not be used for SMTP traffic destined for the customer, that is, mail will not be forwarded.

We are going to install ESRS VE. is there any ESRS VE functionality that can send mails to customer? Has anybody tried any free SMTP application to do that?

Thanks in advance