>After I upgrade IMail from v7.06 to v7.07HF2, some of the recipients
>didn't receive their mail or the sender get "Undeliverable Mail" where in
>the body it says "Delivery attempts failed...". From the log I see this
>when I did some testing:
>
> Trying sms.maxis.net.my (0)
>20020521 192828 127.0.0.1 SMTP (1676) Connect sms.maxis.net.my
>[202.75.130.118:25] (1)
>20020521 192828 127.0.0.1 SMTP (1676) 550 Banned SMTP host TCP/IP
>address: 202.184.114.123 / matched
>20020521 192828 127.0.0.1 SMTP (1676) SMTP_DELIV_FAILED
>20020521 192828 127.0.0.1 SMTP (1676) >QUIT
>
>What does it mean by "550 Banned SMTP host TCP/IP address..."?, please
>help me....thanks...
That means that they have intentionally banned your IP, so that you can't
send them mail. For some unknown reason, they do not want your mail.
I just tried connecting to both their MX records, and didn't even get an
SMTP greeting, so they have serious problems on their end. Given that they
have serious problems, I'm guessing they could easily have blacklisted
"202.181.202.5/8" instead of "202.181.202.5/24", which would blacklist the
entire 202.x.x.x range (which would result in the error you saw).
-Scott
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