Cogent blacklisting ?

Chris Richardson crichardson at
Mon Mar 26 00:14:52 CEST 2007

    SMTP error from remote mail server after RCPT TO:<xxx at>:
    host []: 550 IP is blacklisted:
    Performance Systems International

    SMTP error from remote mail server after RCPT TO:<xxx at>:
    host []: 550-Host is blocked:
    550 Mail refused from egregious spam haven
    550 (CogentCo) by local blocking list

Res wrote:
> Chris,
> On Sun, 25 Mar 2007, Chris Richardson wrote:
>> Just wanted to ask any other customers out there if they are starting 
>> to recieve alot of rejects of outbound mail saying congent is black 
>> listed? i recieve two emails out of like 6 today and never had this 
>> problem untill last night was woundering if any one else was having 
>> this problem and if anyone know what blacklist might be doing this as 
>> the rejections didnt offer much insight
> You mean they are blocking or others are blocking?
> If you know the IP of the server run it through an RBL tester, you can 
> use one ar
> without seeing any 5xx message we wont really be able to assist much 
> further.

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