TOO many emails to send

[peter888]

Hi, friends:

 

I have more than 10,000 customers. It is so hard to send emails to them. Because you only have to options to send email to them. one is to send all customers, other is send email one by one. If I select all customers, it is to hard to send out to all emails, every time it failed.

 

any one knows some best methods to send out emails to all customers. Thanks for help.