Here's a simple way to white-list these emails for Postfix:
- Create a new file
/etc/postfix/ip_whitelistwith the following contents:
These map from mx001.twitter.com to mx008.twitter.com, which seem to be all they have for now.
- Edit your
/etc/postfix/main.cffile to include the IP whitelist. Find the line where you have your RBL checks, e.g.:
and add the following line above them:
- Restart Postfix.
These vital emails should now get through to your psychologically fragile account holders.