No, we are not a bulk mailer or mass mailer service. We ourselves use Amazon's SES and have been very happy with their product.
Exotel uses email as a mechanism to notify you and your co-workers about the events that happen in your phone system. Some events that you can configure Exotel to notify you are:
- Missed call
- Unattended call
- Outbound call
- Customer voicemail
- Call assignment from co-worker to you
- Report download availability etc.