hi again,thanks guys for your support on my previous thread,now im having issues with postfix,all my outbound email messages are not being delivered and returning the following error msg

"This is the Postfix program at host gwatidzo.co.zw.

I'm sorry to have to inform you that your message could not be 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 Postfix program
"

after this statement there will either be this one

"delivery temporarily suspended:
[mail-hub1.telco.co.zw]: Name or service not known
"
where [mail-hub1.telco.co.zw] is my ISP's server, or i get this msg

"delivery temporarily suspended: deferred transport"

i am however receiving all inbound mail

can someone tell me whats goin on and how to rectify this??