20 Apr
2001
20 Apr
'01
10:39
On Friday 20 April 2001 05:18, Christopher W. Aiken wrote:
: host zzzzzzzz.my_isp.com[000.0.000.0] said: 501 ... Sender domain must exist [ Part 2: "Delivery error report" ]
This is an anti spam relay defence. Your provider does not know the domain as being one it has to support for it's subscribers. Our you are sending with a fake domain, or one that is not yours and you are BAD! :) in this case you use a fake domain. So rename you server to bigdaddy.my_isp.com and set postfix to masquerade mail from your machine as xxxxx@my_ips.com. Unless you have your own domain, for which your provider is not the mx. In that case remove the relay. BB, Arjen