[wplug] Blacklisted IP in mail?

[Jason Sopko]

begin  Russ Schneider wrote:
> Ok, testing out one machine emailing another, I got the following back 
> in an undeliverable mail message:
> 
>> <russ at domainname.com>: host mail.domainname.com [xxx.xxx.xxx.xxx] 
>> said: 550 5.7.1
>>     Email rejected: Blacklisted IP a ddress (in reply to MAIL FROM 
>> command)

It could be a few things, but I'd look up the mail server's IP that's 
trying to send the email that's being rejected in the openrbl 
(http://openrbl.org). For example, if you're sending mail from 
russ at sugapablo.com it could be getting rejected due to 
mail.sugapablo.com [63.251.216.37] being on four blacklists, and the 
receiving mail server may be using one of those blacklists for spam 
filtering. Of course, that's the primary MX record for your particular 
domain and may not even be the mail relay you're using. It could be that 
someone on the receiving server manually blacklisted an IP and/or domain 
name, too. If you posted the actual IP address or email address or mail 
logs from both mail servers, if possible, it would make it a lot easier 
to figure out.

///Jason