Sending mails using multiple IPs'

Hi List, I am trying to setup postfix for mass mailing. I need help in following areas: 1. how can we send mails using different IP's . 2. how can we set sleep time between mails. Thanks in advance.

Re: [SPAM] - Re: Sending mails using multiple IPs'

of a mail marketing company, which is very expensive (because our users are growing and growing...). That's why we are trying to setup our own mail server for fullfill our requirement. Thanks again. Stan Hoeppner wrote: Dipak Biswal put forth on 6/30/2010 8:38 AM: Hi List, I am trying