Origin for each line in README from check-in 9a76ed5387:

da7fc7983d 2024-05-23        arcade: First of all make sure to never listen on public IPs and always put sockets in
da7fc7983d 2024-05-23        arcade: directories not acessible by just about everyone on your system. Though
da7fc7983d 2024-05-23        arcade: listening on 127.0.0.1:XXXX is equivalent to creating a world-writable socket.
da7fc7983d 2024-05-23        arcade: 
da7fc7983d 2024-05-23        arcade: To catch bounces (so they wouldn't stuck in upper mail server) make sure sender
9a76ed5387 2024-11-28        arcade: envelope address is real as required by mail library (actually not sure whether
9a76ed5387 2024-11-28        arcade: this applies to mailin). For example Postfix has to be tweaked like this:
da7fc7983d 2024-05-23        arcade: 
da7fc7983d 2024-05-23        arcade: $config_directory/main.cf:
da7fc7983d 2024-05-23        arcade: 	smtp_generic_maps = hash:$config_directory/generic
da7fc7983d 2024-05-23        arcade: 
da7fc7983d 2024-05-23        arcade: $config_directory/generic:
da7fc7983d 2024-05-23        arcade: 	""	postmaster@example.com
da7fc7983d 2024-05-23        arcade: 	<>	postmaster@example.com
da7fc7983d 2024-05-23        arcade: 
da7fc7983d 2024-05-23        arcade: Actually not sure which one works...