Fixed: PowerMTA 550, 5.7.1 relaying denied for recipient
For security reasons, PowerMTA does not allow external relaying by default
The default configuration only allows messages to be sumitted from the local 127.0.0.1 IP address.In order to submit messages for delivery from a different host, you will need to enter its IP
address(es) into the configuration file by creating one or more source entries and
specifying the always-allow-relaying directive.
When configuring PowerMTA for outbound, you want it to accept e-mail from your feeders for
Relay-domain and relay-address directives in the configuration file are
all domains, by using always-allow-relaying.
really only useful when PowerMTA is used to handle inbound traffic. That allows you to
specify the domains in messages which PowerMTA is to accept from any sources.