i am having Rh9 linux machine working as mail server and dns server.
i am able to send mail and receive mail .Sometimes, i getting
The message could not be sent because one of the recipients was rejected by the
server. The rejected e-mail address was 'de@xxxxxxxx'. Subject 'Re: Reference
for Connect', Account: 'mail.biot.com', Server: 'mail.biot.com', Protocol:
SMTP, Server Response: '550 5.7.1 <de@xxxxxxxx>... Relaying denied. IP name
lookup failed [220.127.116.11]', Port: 25, Secure(SSL): No, Server Error: 550,
Error Number: 0x800CCC79
How to solve this problem.
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