On 9 August 2017 at 12:35, Mai Ling <mailinglist...@gmail.com> wrote:
> My small office client upgraded his internet connection and I've updated
> the self hosted postfix configuration file with the new IP address.
> Soon after, email users began complaining about bounces they started
> receiving for some emails they sent.
Just checking, is the new ip dynamic? Dynamic ips are blacklisted by many
rbls automatically (and requests for exceptions will be ignored), so in
this case you must use a relayhost.