Christopher Chan wrote:
The dest mta is most probably doing a blank sender address verify on all emails. Although running a mail server on a dynamic ip is discouraged and use of the ISP's relay box is encouraged, I doubt that in this case that it will make any difference unless the dest mta has the ISP's ip(s) whitelisted which I doubt every much. The solution is to use a verifiable returnpath with bonus points for setting DS.
well, he'll need to configure his script to specify a valid FROM address, is that what you mean? it might require configuring his local sendmail to masquerade all outbound mail as whatever 'real' domainname he uses for email, like, peterl@xxxxxxxxxxxxxxxx ...
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