[afrinic-anti-spam-discuss] Mail Server Blocking IP Address

[Adeosun Tosin]

Dear Earnest,

I work with an ISP company and the mail server that is blacklisting the IP
is our clients mail server not our own mailserver. Am looking for a solution
that can drop the mail before leaving our network rather than it affecting
out IP on their mail server.

Regards

Tosin Adeosun  

-----Original Message-----
From: Ernest [mailto:ernest at afrinic.net] 
Sent: 10 September 2013 17:14
To: Anti-spam technical list
Cc: Adeosun Tosin
Subject: Re: [afrinic-anti-spam-discuss] Mail Server Blocking IP Address

Hi Tosin,

> I discover of late that when the IP address assigned to our clients
> is not blacklisted and the clients mail server IP is not Blacklisted
> as-well. The client is not able to send mail, more so, we only allow
> our clients to send mails on port 25 and 587.
> 
>  It's like the mail server is seeing spamm coming from our IP and
> blocks our IP address and the client will only be able to send mail
> after changing their IP. This is not just a client but about 5
> clients that have experienced on their mail servers.
> 
> Kindly advice.


So your problem is a bit difficult to decipher but it looks normal
to me.

Your mail server detects possible abusive activity from your clients
and blocks their outgoing email. Sounds a perfectly normal operation
to me, unless of course I missed something..

Regards
ernest