PGNet Dev:
> currently, my config does include
>
> smtpd_helo_required = yes
> smtpd_helo_restrictions =
> permit_mynetworks
> check_helo_access pcre:${config_directory}/helo_access.pcre
> reject_invalid_helo_hostname
> reject_non_fqdn_helo_hostname
> permit
>
> is adding to head of helo_access.pcre
>
> /.*\.outbound\.protection\.outlook\.com/ OK
That should be safe, because the OK here cannot affect how a recipient
will be evaluated.
Wietse
