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.
> ‚Äč..
>

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.

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