6 Jun
2011
6 Jun
'11
4:44 a.m.
On Monday 06 Jun 2011, Rony wrote:
[snip] However, why is the ISP allowing this unknown user which postfix is relaying when I have everything set in the smtp_auth_ part of postfix? Suppose there is a flaw in my settings, shouldn't the ISP's mail server reject those mails when the username and password do not match with their list? That user has been deleted from their server.
Because the ISP is relaying based on the authentication your server provides (which could be IP or login based), and not on the auth the original client provided to your server. In other words, once the mail gets into your server, it will get relayed regardless of who sent it.
Regards,
-- Raj
--
Raj Mathur raju@kandalaya.org http://kandalaya.org/
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