Description of problem:
* Edit/delete Newsletter functionality not working
* Newsletter not sent to recipient

Version-Release number of selected component (if applicable):
EPP-SP 5.2.1

How reproducible:
Always

Steps to Reproduce:
1. In a clean EPP+SP installation with the e-mail service configured, I signed in as root and entered into acme/newsletter and subscribed my e-mail to "market" category;
2. I received the e-mail asking for confirm the subscription and I did;
After it, I went to Group -> Newsletter and tried to send a message. I could see my e-mail in the e-mails of that groups;
3. First I tried to schedule a message, the message stayed with status "awaiting";
4. When I directly send the message, it sometimes shows send, but actually I didn't receive any e-mail.