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.
