Mail Delivery System wrote:
This is the mail system at host server1.simplistix.co.uk.
I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can delete your own text from the attached returned message.
The mail system
email@example.com: host mail2.domainpeople.com[126.96.36.199] said: 550 relay not permitted (in reply to RCPT TO command)
Looks like something is not happy with your mail setup...