It might be helpful to permit connections to your submission port even
when you are overloaded and even when the client is not on your local
network. However, Exim doesn't have an smtp_reserve_interfaces option. But
you can get the desired effect because smtp_reserve_hosts is expanded:
smtp_reserve_hosts = ${if eq{$interface_port}{587} \
{*} {+relay_from_hosts} }
Tony.
--
<fanf@???> <dot@???>
http://dotat.at/ ${sg{\N${sg{\
N\}{([^N]*)(.)(.)(.*)}{\$1\$3\$2\$1\$3\n\$2\$3\$4\$3\n\$3\$2\$4}}\
\N}{([^N]*)(.)(.)(.*)}{\$1\$3\$2\$1\$3\n\$2\$3\$4\$3\n\$3\$2\$4}}