> On May 6, 2018, at 2:55 AM, ahsan2011 <ahsan2...@gmail.com> wrote: > > I have added this in main.cf > > inet_interfaces = smtp-2.xyz, xxx.xxx.xxx.xxx(ip address) > > in master.cf, this is added > > smtp inet n - n - - smtpd
No two instances may attempt to use the same IP address. When using multiple instances, on many operating systems, no instance may attempt to use the "wildcard" IP address (inet_interfaces not set). Do not mix IP addresses and names in inet_interfaces, best use just IP addresses. -- Viktor.