Robert Schetterer:
> smtpd_data_restrictions = check_recipient_mx_access
> hash:/etc/postfix/check_recipient_mx_access
Postfix has no multi-recipient lookup feature, so the above is a
NOOP for multi-recipient mail.
> mx0.gmx.net FILTER slow:mx0.gmx.net
> mx1.gmx.net FILTER slow:mx1.gmx.net
Absent concrete evidence I would not assume that mx0.gmx.net and
mx1.gmx.net are implemented as one computer per mx record, and I
would not assume that their MX hosts enforce rate limits etc.
independently.
Therefore, instead of using FILTER, and instead of using filters
per gmx MX record, I would use a transport map with ``gmx.net->slow:''.
Wietse
