Relaying denied. IP name possibly forged [210.14.45.000]

From localhost to SOME domains

[neophyte]

Hello All -

When I'm testing client email functionality on my local box my mail() function SOMETIMES dies and reports this error: Relaying denied. IP name possibly forged [210.14.45.000]. So, I clear my cache; restart my browser; restart dreamweaver; restart my machine; run spyware software; smoke a carton of cigarettes; restart my machine again; kick the dog through the hedge; restart my machine again... still no dice.

As noted, this doesn't happen all of the time... sometimes it happens when I try to send emails from my dev environment to hotmail addresses or to Philippine (.ph) domains.

But, boy, is this irritating. When this comes up, I have to put the code on my own live server space to test/amend/test/amend which really slows things down.

There's a lot of stuff I found on the web regarding this problem (in general) but nothing that I could see that would say "do this, and It'll be fixed".

Is there something that I need to do to my php_ini file or something that will stop this from happening? My ini settings are:

[mail function]
; For Win32 only.
SMTP = mail.neodomain.com
smtp_port = 25

; For Win32 only.
sendmail_from = [e-mail]

I'm not at all intimately knowledgeable with how email works, but I'm really hoping that one of the good folks here can just say "oh yeah, okay, here's what you can do to fix it!"

Great appreciation in advance.

Neophyte

[jatar_k]

are you changing the reply to, return path, from or others

since you are sending through your domain if you have the client data in the email it can definitely give that error

[neophyte]

Jatar -

Sorry for the late, late reply - have been out of the country.

Anyway, thanks for your suggestion; I'll check the reply to, return path, et. al. to see if something is amiss there.

Thanks again! Neophyte