i need your help for the best performance of sending an email,
check this server:
centos 6 + cpanel + dovecot + 10 additional ip + 15 domain
i want to configure sending email service which can switch ip and domain for prevent any spamming result in gmail or etc,
this server is use for our company newsletter,
i have configure all general setting like rdns spf and dkim,
how can i use all this ips and domain ?
how can i host these domains? use one of them + park others ??