Edit the postfix main.cf configuration file to add a rejection on sender source :
smtpd_sender_restrictions = pcre:/etc/postfix/rejected_domains
Create the rejected_domains file, enter proper filtering like :
/facture.info$/ PERMIT specific sender from @facture.info
/\.info$/ REJECT All info other info domains are rejected
Compile the file into a database with postmap command :
postmap rejected_domains
This will update/create the postmap rejected_domains.db
Reload the postfix configuration
service postfix reload