Hi

i had to install a mail server for a firm with a leased line 
connection. Initially, perhaps due to some mis-configuration, it seems 
that the linux box was used as relay by spammers. 

The extenal IP is on eth0 and internal class C is on eth1. It seems i have 
been able to stop relay. I use postfix on RH9. 

My problem is that one of the hosts  to which we mail frequently sent mail
has 'blocked' all mails from our domain. Some tech from the hosts side 
says that the blocking of mail has been IP based. I changed the external IP of 
our system to the next number ie xxx.xxx.xxx.14 to xxx.xxx.xxx.15.

But still the mail to that domain gets bounced always. There is no problem 
with any other domains. How do i fix it? Should i contact the site for a 
fix?  

Also please look at the following 'main.cf' of postfix.
-------------------------------------------------------------------------
myorigin = $mydomain
inet_interfaces = all
mynetworks_style = subnet
relay_domains = $mydestination
#local_recipient_maps = hash:/etc/postfix/recipients
local_recipient_maps =
masquerade_domains = $mydomain
always_bcc = someuser
smtpd_recipient_restrictions = permit_mynetworks reject_unauth_destination

-----------------------------------------------------------------------

I kept local_recipient_maps blank as i was not able to access the port 25 
(it was taking too much time to respond) when it was equated to 
hash:/etc/postfix/recipients. 

I kept a list of users in /etc/postfix/recipients


Please help me out

regards

Nataraj



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