At 07:42 12-06-2007, Dan Barker wrote:
>I'm receiving a lot of 421 rejects with:
>Unexpected connection response from server:
>421 mails from refused: local dynamic IP address

That IP address is not dynamic. The reverse DNS is correct.

>Does anybody recognize the text of the message? I'd like to confirm that
>there are no popular DUL lists showing as dynamic, but the 421
>message says very little. DNSReport says it's clean. I've tried to contact
>some postmaster accounts (using, since I can't use my own mailer)
>but they appear to be RFC ignorant too. Unfortunately, it's not just one ISP
>in Germany and I'd like to understand if there's anything I can do on my

Isn't it a web hosting provider? If so, maybe they have some web
form for contacting them.