~control/relaymailfrom
From Qmail-LDAP Wiki
This file contains envelope sender addresses that are allowed to relay through this server.
Default:
none
Example:
user@domain.com or @domain.com
Notes:
- Multiline.
- Use with care, the envelope senders address can easily be spoofed and then you are an open relay again. It is better to use a scheme like POP before SMTP.
